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This article is about a/an rider in Kamen Rider Build.

"I'm not gonna lose!"
―Cross-Z's catchphrase after transformation.[src]

"I don't feel like losing!"
―Ryuga when entering battle as Cross-Z Charge[src]

"My magma is boiling!"
―Ryuga when entering battle as Cross-Z Magma[src]

"Don't mess with me!"
―Ryuga whenever he hears something he doesn't like. [src]

"What do you think of my sixth sense?"
―Ryuga whenever he's being a show off to someone.[src]

Ryuga Banjou (万丈 龍我 Banjō Ryūga)[1] is a 23-year-old ex-fighter who was wrongly imprisoned for the murder of a scientist named Takumi Katsuragi, who was involved with the Pandora Box. Abducted by Faust while in prison, Ryuga managed to escape with his humanity intact, which would lead him to join Sento Kiryu in uncovering the truth behind their shared experiences as Faust victims.

He uses the Cross-Z Dragon given to him by Sento to become Kamen Rider Cross-Z (仮面ライダークローズ Kamen Raidā Kurōzu), the secondary rider of Kamen Rider Build.

As war breaks out between Hokuto and Touto, Ryuga takes the Sclash Driver against Sento's objections to become Kamen Rider Cross-Z Charge (仮面ライダークローズチャージ Kamen Raidā Kurōzu Chāji) until it was destroyed when Ryuga protected the possessed Misora from Blood Stark's attack. However, the Dragon SclashJelly remains turned into Dragon Magma Fullbottle through unknown means.

Later, Using the completed Dragon Magma FullBottle and Cross-Z Magma Knuckle, He's able to Transform into Kamen Rider Cross-Z Magma (仮面ライダークローズマグマ Kamen Raidā Kurōzu Maguma)

In Episode 30, his humanity is called into question, implying Ryuga may not even be human, which is confirmed in the following episode, revealing he is of extraterrestrial origin.

Character History

Arrival on Earth

Baby Banjo

Sento interrupts Ryuga's recollection of his birth.

In 1994, 13 years before Sky Wall Incident, an unmanned space probe from Japan landed successfully on Mars and returned to Earth. After its return to the Nanba Heavy Industries Institute of Synthetic Science, the probe unexpectedly brought back an alien specimen in the form of glowing red slug-like creature, which made its way out of the probe and planted itself into Yuri Banjou, a security guard who was stationed there with her husband, through unknown means, causing her to fall unconscious while on duty. During a checkup at a hospital, she was discovered to be one month pregnant, which was the suspected reasoning behind her collapse.

A month later, Ryuga was born in Yokohama. To everyone's bewilderment, the child was in perfect health, weighing 3.2 kg despite his two-month gestation period. Because of this oddity, he was examined at a university hospital, discovering a cellular structure never before seen in humans in him. He was later be re-examined at the Namba Heavy Industries Institute of Synthetic Science, discovering his genes are of extraterrestrial origin. This resulted in periodic examinations from the Institute, under the supervision of Shinobu Katsuragi, until his parents' death.

Ryuga lost his parents in an accident at the age of 13. Ryuga doesn't remember the details of the accident or even his past experimentations, which he attributes to the trauma of the event. However, Sawa speculates that the researchers might have altered Ryuga's memories during the experimentation.

Present

As an adult, Ryuga became a professional fighter, eventually getting engaged to Kasumi Ogura. By the age of 22, Ryuga earned a lifelong ban from fighting for throwing a match; it is implied that he accepted a bribe in order to pay for the frail Kasumi's medical bills. To help his search for a new job, Kasumi directed Ryuga to Takumi Katsuragi, a researcher at the Touto Institute of Advanced Matter Physics, who was apparently looking for an assistant. However, when Ryuga came to Katsuragi's home to apply, he found the corpse of "Katsuragi" inside. Moments later, Touto's Guardians arrived and apprehended Ryuga. It would be revealed that it was Soichi Isurugi who called Ryuga the murderer, which would give Ryuga a ten-year sentence in prison.

While in prison, he was attacked by a prison guard working for Faust, who injected him with Nebula Gas. However, Ryuga's naturally high Hazard Level allowed him to escape mid-experiment with his memories and humanity intact. After fighting off the Faust scientists, he retreated to the sewers.

The Rabbit Tank Meets Dragon

Ryuga was eventually found by Touto's Guardians, who attempted to recapture him. Ryuga managed to fend off the Guardians and escaped before he was apprehended by Sento Kiryu, who had tracked him upon noticing his Smash-like energy readings. Upon realizing that Ryuga had undergone a similar experience, Sento began interrogating Ryuga in hopes of uncovering his past, despite Ryuga's frustrated belligerence. The two were interrupted by Strong Smash, who attacked Ryuga. However, Ryuga was saved by Sento, who transformed into Kamen Rider Build and defeated the Smash. Ryuga recognized the Smash's human identity as one of his fellow victims but was frustrated to find that the man had no memories of the experiments. The Touto government arrived soon after to retake Ryuga. Sento, believing in Ryuga's innocence, helped him escape.That One with the Best Match

Burn Smash incident

Sento brought Ryuga to the basement lab of the nascita café, where the former had been living for the last year. After meeting Sento's accomplices, Souichi and Misora Isurugi, Ryuga explained the circumstances that resulted in his arrest. However, the story was interrupted by Sawa Takigawa, a freelance journalist who had entered the base (due to Souichi and Sento's carelessness).

As a precaution, Ryuga was chained up in the lab, much to his chagrin. Misora took the time to explain the Fullbottle purification process to Ryuga, as well as Sento's job. Noticing Misora's smartphone, Ryuga goaded her into proving her ability to purify Smash energy. As planned, Misora left her smartphone where Ryuga could reach it, allowing him to contact Kasumi. However, much to his horror, Kasumi had been kidnapped by Faust as well. Given Kasumi's location by Night Rogue, Ryuga broke out of nascita and raced to save his fiancé. After another encounter with Guardians (which ended with being saved again by Build), Ryuga explained his motives to Sento but choked him into unconsciousness to prevent him from getting involved.

When Ryuga finally arrived at the location, he learned that he was too late: Kasumi had already been transformed into the Burn Smash. Unable to see his beloved hurt, Ryuga begged Sento not to attack her when the latter arrived. The two were quickly overwhelmed by the Smash and Night Rogue, upon which the latter revealed the horrifying truth: Kasumi's body was too weak, and removing her Smash element would be fatal. Realizing that Kasumi could not be saved, Ryuga begged to Build to end her suffering. Sento was able to separate Kasumi's consciousness long enough for her and Ryuga to say their goodbyes. Left almost broken by grief, Ryuga would have let himself be captured again if not for Sento, who reminded him that it would all be for nothing if he got arrested again. Kasumi's Smash essence was purified into the Dragon Fullbottle, which Sento gave to Ryuga as a memento of his beloved. Soon after, Sawa arrived, having discovered the identity of the guard who attacked Ryuga: Masahiro Nabeshima.The Innocent Runaway

Continuing the Search

After some searching, Ryuga managed to contact Nabeshima. Nabeshima revealed that his family was being threatened by Faust, upon which Ryuga offered to smuggle them out of Seito to safety in exchange for Nabeshima testifying for his innocence (not realizing this was a trap set up by Night Rogue). With Sawa's help, Ryuga snuck to Seito. Upon retrieving Nabeshima's wife and daughter, Ryuga and Sawa were attacked by hijacked Guardians, barely escaping with their lives. Ryuga arrived in Touto to aid Build in taking down Nabeshima, who had been subjected to two Smash transformations by Faust. While Nabeshima was returned to his human form, the experiments wiped his memory clean, leaving him unable to recognize his daughter, let alone testify for Ryuga.

The next lead came in the form of Tatsuya Kishida, who was roommates (as well as bandmates) with Sento before the latter lost his memory.

Becoming Cross-Z

Learning Sento Kiryu's True Identity

Rebuilds The RabbitTank

Northern Invaders

Cross-Z charges up

In one fight, Ryuga was granted the Kuma and Televi Fullbottles by Grease as a concession when the Hokuto Three Crows interfered in their battle and breaking the rules. After giving the new pair to Sento, Ryuga was see that nascita finally had a customer in the form of Massugu Ubukata. Providing his customer with a canned coffee, Ryuga, foreseeing a boon in business, set out to acquire a bountiful stock of coffee beans, only to find the shop as vacant as usual when he returned. Kamen Rider Build: Birth! KumaTelevi!! VS Kamen Rider Grease!

West Phantoms

Cross-Z Charges into Hell

Seito proposes a 3-on-3 representative battle to Touto. Ryuga is participating Round 2 against Fu Washio. Much to the surprise of Ryuga, the announcement depicts the name his opponent is "Hell Bro's", which he had never heard before. As Ryuga prepare his transformation, he is interrupted by the sudden appearance of the Gear Engine on Fu's hands. Fu uses it along with his personal Gear Remocon to transform into Hell Bro's, completely overwhelming Ryuga's expectations. However, Ryuga didn't waver and proceed to transform into Cross-Z Charge.

As Cross-Z Charge and Hell Bro's goes down on a fierce fight, Ryuga determination to not let Sento burden himself and end the war manage to overwhelm Hell Bro's. But, Fu suddenly claims that if he about to lose this proxy battle, Rai will be executed. Ryuga was torn between saving Touto or saving Rai as Fu take his chance to soundly defeat Ryuga. Fu later mock Ryuga by being too gullible as he fell to Fu trick, showing that Rai is in fact, never get captured Hostage. Although visibly frustrated, Ryuga accept his loss and exclaiming that Sento will be the one who end the war before leaving.

Ryuga predictions came out true as Build manage to defeat Rogue using TankTank form, and Ryuga celebrates Sento victory along with Misora, much to Kazumi ire.

Sclash Driver Destroyed, and Going Magma

"My power will overflow...my soul will burn...and my magma will surge!"
―Ryuga's exclamation upon becoming Cross-Z Magma[src]
After Vernage resurfaced from Misora's bracelet, Blood Stalk got his transformation knocked out after the queen blew a strong gust of wind at him. He then tried to attack her again, but Ryuga stood in the way. However, this resulted in Ryuga's Sclash Driver getting destroyed, and the Dragon Sclashjelly overheated to a burnt ball of ash.

Back in nascita, the Dragon Sclashjelly reacted to Ryuga's emotions, creating the Dragon Magma Fullbottle. Seeing this, Sento later made the Cross-Z Magma Knuckle for Ryuga to use with it as it was too dangerous for the Build Driver alone. This in turn, helped Ryuga fight off Blood Stalk and Hell Bro's with ease. The Truth of the Pandora Box

In the middle of dealing with Hell Bro's, Gentoku entered the scene, transformed into Rogue, fought, and sneakily explained what was actually Soichi's plan by whispering to them on every single strike he did. The truth was shocking for Ryuga as Rogue declared that he was not human and was the target for Stark not just by chance, especially on why Kasumi was kidnapped and killed. All of this was to give Ryuga his power and increase it over time.

After Sento knocked down Gentoku, he, Ryuga, and Kazumi went and found Soichi. As Soichi went serious, his strength proved to be far stronger than Build RabbitRabbit Form and had Kazumi knocked down unconscious. Ryuga asked Soichi if what Gentoku had told was the truth, shocking Soichi and claiming that it was true, making Ryuga mad but still unable to beat him.

As Soichi was about to kill Sento, Ryuga's anger became stronger which finally stabilized the Dragon Magma Fullbottle. Despite not being told about Cross-Z Magma Knuckle's ability to evolve his form, Ryuga used the Cross- Z Magma Knuckle and the Dragon Magma Fullbottle to transform into Cross-Z Magma. His new form was able to knock down Soichi and give him the chance to take Pandora Box as well as save the others.

Ryuga, the Humanity's End?

Ryuga was told by Soichi or Evolt that he was the same as him, the one who would destroy the world.

Personality

Ryuga is a hot-blooded and impulsive man, tending to lash out quickly. While nowhere near as intelligent as Sento, Ryuga prefers to confront problems directly using his fists and doesn't want to involve other people in his own problems. Also, unlike Sento, he does not overthink things, preferring to use common sense, as shown when he was easily able to guess two Best Matches on his own. He is shown to easily get startled, especially when the bell goes off indicating a Fullbottle is ready.

Despite being a capable fighter, Ryuga is shown to be easily provoked in most situations. When combined with the priority to prove his innocence, it sometimes caused a major sidetrack in Build's battles against Smash (such as transforming Tatsuya back into Press Smash just to locate Faust's base) without even forming the next phase of his plans.

Beneath his tough exterior is an honest, selfless and honorable individual. It is implied that the cheating that banned him from fighting was to get money for his fiancée's medical treatments. Ryuga also has a friendly side, such as when he encourages Takehiko after Build removed the Smash essence from him.

Ryuga is also shown to have a protective side, as when he attacked Blood Stalk out of anger for the sake of both Sento and Misora, completely disregarding the fact that Stalk framed him. He also directly apologized to Sento Behalf to the remaining Hokuto Three Crows, partially blaming himself due to letting Sento use Hazard Trigger for his own sake.

Upon constant usage of the Sclash Driver, Ryuga's personality becomes more aggressive with the single task of getting stronger and beating down his opponent. These side effects also remove his rationality to make decisions, but he is able to overcome these weaknesses with his strong will to save Sento from rampaging with the Hazard Trigger.

Ryuga appears to hold a lot of fondness for his childhood, as whenever he describes the circumstances of his birth, a bright smile is always on his face.

Powers and Abilities

  • Hand-to-Hand Combat: Ryuga is a skilled fighter, having fought professionally before getting a lifelong ban.
  • High Hazard Level: Initially, Ryuga's Hazard Level is above 2.0, allowing him to retain his humanity after exposure to Nebula Gas while still gaining physiological powers from it. According to Blood Stalk, while fighting, Ryuga can raise his Hazard Level, having raised it as far as 2.7 in their fight. Eventually, he was able to raise his Hazard Level to 3.0, which is high enough to use the Build Driver. Continued fighting as Cross-Z allowed him to quickly raise it even further to 4.0, enabling him to use the Sclash Driver. Ryuga's Hazard Level grows at a faster rate than any other Kamen Rider, to the point where his strength grows noticeably in a single fight.
    • Superhuman Strength: Ryuga has displayed enhanced strength: he was able to fight off numerous Guardians on his own, and break metal chains with his bare hands.
    • Smash Energy Signature: Since he is exposed to the Nebula Gas, Ryuga gives off an energy signature similar to a Smash, which alerted Sento to his location.
  • Extraterrestrial Physiology: According to Sawa's speculation, Ryuga possesses a vast amount of alien DNA in his body. This allows him to utilize the Pandora Box's power like Stalk (albeit unintentionally) and absorb the same power needed to complete the Dragon Magma Fullbottle. Furthermore, his eyes will glow red while doing so.
    • Hazard Level Escalation: Although the true extent is still unclear, Ryuga's extraterrestrial biology allows him to raise his Hazard Level at a faster rate than others.
  • Fullbottle Augmentation: By using a Fullbottle in his hand without transforming, Ryuga can gain abilities based on said Fullbottle's traits:
    • Dragon: Ryuga's punches give off powerful shockwaves. Notably, his strong synchronization with the Dragon Fullbottle causes his power to increase with each use. Currently, it gets to the point where Ryuga is strong enough to even defeat a Hazard Smash while as a human.

Weaknesses

  • Sclash Driver: (Previously) Although the Sclash Driver gives Banjou tremendous power, its usage slowly turns Banjou into a more aggressive person and gives him an addiction to battle. Furthermore, the driver administers electrical shockwaves to the user after a period of time, canceling his transformation and rendering him unconscious. After learning from Sawa that Sento built a failsafe to destroy the Hazard Trigger and kill himself, Banjou overcomes his guilt and turns into Cross-Z Charge to stop Sento in his HawkGatling Hazard form. During the fight, the Sclash Driver begins to increase his aggressiveness, yet he manages to overcome it by reminding himself to save Sento, thus gaining control over his Cross-Z Charge form.

Forms

Cross-Z
KRBu-Crossz

Kamen Rider Cross-Z

"Cross-Z Dragon! Are you Ready? Wake up burning! Get Cross-Z Dragon! Yeah!"
―Transformation announcement[src]

Rider Statistics

  • Rider Height: 197.0 cm
  • Rider Weight: 102.4 kg

Ability Perimeters:

  • Punching Power: 27.6 t
  • Kicking Power: 33.7 t
  • Maximum Jump Height: 57.7 m
  • Maximum Running Speed: 100 m per 3.2 sec.

Cross-Z's base form is accessed utilizing the Cross-Z Dragon, which adapts the Build Driver's two slots into one, allowing him to use only the Dragon Fullbottle to transform.

Utilizing Cross-Z, Ryuga becomes a force to be reckoned with, blowing far past Build, Night Rogue, and Blood Stalk's Ability Perimeters. It possesses a greater punching power than Build's GorillaMond Form, has a stronger kicking power than Build's KeyDragon Form, and exceeds RabbitTank Form's maximum jump height. Though it loses to some of Build's more agile forms, it is still faster than both Night Rogue and Blood Stalk.

Cross-Z's personal weapon is the Beat Closer, although he has been seen using the Cross-Z Magma Knuckle at times.The Truth of the Pandora Box

Cross-Z can perform Hit-Parade (ヒッパレー Hipparē) special attacks with the Beat Closer depending on how many times he pulls the bottom of the weapon's handle:

  • Smash Hit (スマッシュヒット Sumasshu Hitto): Cross-Z delivers a powerful slash with the blade covered in dark blue fire.
  • Million Hit (ミリオンヒット Mirion Hitto): Cross-Z delivers a continuous powerful slash with the blade covered in red, yellow, and green energy in a bar-like fashion.
  • Mega Hit (メガヒット Mega Hitto):

Cross-Z has three different finishers:

  • Build Driver finisher:
    • Dragonic Finish (ドラゴニックフィニッシュ Doragonikku Finisshu):
      • Rider Kick: Cross-Z summons a blue and orange energy Chinese dragon that flies behind him, then jumps up as the dragon breaths fire, sending him at the enemy, then delivers a roundhouse kick whilst his foot is covered in blue energy.
      • Rider Punch: Cross-Z coats his right hand in energy in the shape of a blue Chinese dragon head, then delivers a punch.
  • Beat Closer finishers:
    • Smash Slash (スマッシュスラッシュ Sumasshu Surasshu): Cross-Z channels the energy of a Fullbottle in his Beat Closer, pulls the handle one time and performs a powerful slash.
    • Million Slash (ミリオンスラッシュ Mirion Surasshu): Cross-Z channels the energy of a Fullbottle in his Beat Closer, pulls the handle two times and performs a powerful slash.
      • Lock: This finisher has two variations:
        • Cross-Z sends a dark blue fire stream at the enemy.
        • Cross-Z binds the enemy with energy chains.
    • Mega Slash (メガスラッシュ Mega Surasshu): Cross-Z channels the energy of a Fullbottle in his Beat Closer, pulls the handle three times and performs a powerful slash.
      • Lock: Cross-Z strikes the enemy with the Beat Closer as it projects an energy version of the Bind Master Key.
  • Cross-Z Magma Knuckle finisher:
    • Volcanic Knuckle (ボルケニックナックル[2] Borukenikku Nakkuru): By plugging a Fullbottle into the top of the Magma Knuckle before pressing the front, Cross-Z can empower the punches he delivers with it.
      • Dragon: The Cross-Z Magma Knuckle gives off dark blue energy shock waves upon impact.
      • Taka: The Cross-Z Magma Knuckle projects a pair of orange energy hawk wings as Cross-Z send an uppercut the enemy.

Appearances: Build Episodes 11-14, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders, Build 15-17, 27 (flashback), 30-32

Cross-Z Magma
KRBu-Crosszmagma

Kamen Rider Cross-Z Magma

"Cross-Z Magma! Are you Ready? Gokunetsu Kinniku! Cross-Z Magma! Achachachachachacha Acha!"
―Transformation announcement[src]

Rider Statistics

  • Rider Height: 201.3 cm
  • Rider Weight: 116.3 kg

Ability Perimeters:

  • Punching Power: 56.1 t
  • Kicking Power: 61.7 t
  • Maximum Jump Height: 73.2 m
  • Maximum Running Speed: 100 m per 1.3 sec.

Cross-Z Magma is Cross-Z's final form, accessed by using the Cross-Z Magma Knuckle (loaded with the Dragon Magma Fullbottle) in the Build Driver, hence known as the Extremely Hot Muscle (極熱筋肉 Gokunetsu Kinniku)

Cross-Z Magma is superior in all categories to his previous forms, as well as most other Riders - his agility is only surpassed by Build's RabbitRabbit Form, and his attack strength is only surpassed by Build's TankTank Form. In this form, Ryuga was able to completely overwhelm an unyielding Blood Stalk, something both Build and Grease had difficulty doing.

Cross-Z Magma employs magma-coated attacks with his physical strikes. These strikes release bursts of Variable Magma upon impact and leaves splashes of the smoldering substance on the target, causing additional burns and damage. He can also use the substance to create constructs, such as dragons, that coat the target. This ability also has the added bonus of restraining mobile targets as the material rapidly cools.

Cross-Z Magma gains power as Ryuga fights and his adrenaline rises, causing his suit to glow and heat up to the point that lava is released from the suit. This heat may cause Ryuga discomfort, but it does not harm him.

This form's Rider Finish is the Volcanic Attack (ボルケニックアタック[2] Borukenikku Atakku):

  • Cross-Z Magma leaps in the air accompanied by numerous Variable Magma dragons that attack the target before combining with Cross-Z for an explosive flying kick.

Cross-Z Magma's ending theme is entitled "Burning My Soul".

Appearances: Build Episodes 31-32


Cross-Z Charge
KRBu-Crosszcharge

Cross-Z Charge

"Dragon Jelly! Tsubureru! Nagareru! Afurederu! (Intense rock music) Dragon in Cross-Z Charge! Buraa!"
―Transformation announcement[src]

Rider Statistics

  • Rider Height: 201.0 cm
  • Rider Weight: 113.3 kg

Ability Perimeters:

  • Punching Power: 31.5 t
  • Kicking Power: 34.1 t
  • Maximum Jump Height: 54.0 m
  • Maximum Running Speed: 100 m per 2.5 sec.

Cross-Z Charge is Cross-Z's super form accessed by inserting the Dragon Sclashjelly into the Sclash Driver and pumping the lever.

This form gives Cross-Z a balanced power-up that's on par even with Build RabbitTank Sparkling Form. He could even jump higher than Build aforementioned form, albeit slightly slower.

Cross-Z Charge's personal weapon in this form is the Twin Breaker. He can also wield the Beat Closer if needed.

Ryuga lost access to this form when Soichi Isurugi struck his Sclash Driver with his Martian powers, causing the remains to transform into the basis for the Dragon Magma Fullbottle. The Truth of the Pandora Box

Cross-Z Charge has two different finishers:

  • Sclash Driver finisher:
    • Scrap Break (スクラップブレイク Sukurappu Burēku):
      • Rider Kick: Cross-Z Charge does a flying sidekick, which a dragon's head forms around his right leg.
      • Rider Punch: Cross-Z Charge delivers a punch with his fist covered in cyan and orange energy.
    • Charge Crash (チャージクラッシュ Chāji Kurasshu): Cross-Z Charge can use the power of an Organic Fullbottle.
      • Taka: Cross-Z Charge sprouts a pair of orange wings resembling the Sollstall Wings, and uses them for flight.
  • Twin Breaker finishers:
    • Beam Mode:
      • Single Finish (シングルフィニッシュ Shinguru Finisshu): Cross-Z Charge channels the energy of a Fullbottle or the Dragon Sclashjelly and performs a powerful blast.
        • Fullbottle:
        • Sclashjelly:
          • Dragon: Cross-Z Charge shoots a blue energy ball at the enemy.
      • Twin Finish (ツインフィニッシュ Tsuin Finisshu): Cross-Z Charge channels the energy of 2 Fullbottles or a Fullbottle and the Dragon Sclashjelly and performs a powerful blast.
        • 2 Fullbottles:
        • Fullbottle + Sclashjelly:
      • Let's Finish (レッツフィニッシュ Rettsu Finisshu): Cross-Z Charge channels the energy of the Cross-Z Dragon or the RabbitTank Sparkling Fullbottle and performs a powerful blast.
        • Cross-Z Dragon:
    • Attack Mode:
      • Single Break (シングルブレーク Shinguru Burēku): Cross-Z Charge channels the energy of a Fullbottle or the Dragon Sclashjelly and performs a powerful slash.
        • Fullbottle:
          • Dragon: Cross-Z Charge stabs the enemy with the Twin Breaker, delivering a great, dark blue shockwave upon impact with enemy.
        • Sclashjelly:
      • Twin Break (ツインブレイク Tsuin Burēku): Cross-Z Charge channels the energy of 2 Fullbottles or a Fullbottle and the Dragon Sclashjelly and performs a powerful slash.
        • 2 Fullbottles:
        • Fullbottle + Sclashjelly:
          • Dragon + Dragon: Cross-Z Charge stabs the enemy with the Twin Breaker, delivering a turquoise fire stream to the enemy that takes the shape of the Dragon Head on the Dragon Sclashjelly.
      • Let's Break (レッツブレイク Rettsu Burēku): Cross-Z Charge channels the energy of the Cross-Z Dragon or the RabbitTank Sparkling Fullbottle and performs a powerful slash.
        • Cross-Z Dragon: Cross-Z Charge summons a blue and orange energy Chinese dragon that flies behind him, and use it to stab the enemy.
  • Twin Breaker + Beat Closer finisher: Cross-Z Charge can combine the powers of the Beat Closer and the Twin Breaker to perform a powerful finisher.
    • Mega Slash/Let's Break (メガスラッシュ/レッツレイク Mega Surasshu/Rettsu Burēku): Cross-Z Charge channels the energy of the Cross-Z Dragon or the RabbitTank Sparkling Fullbottle in the Twin Breaker in Attack Mode, and the energy of a Fullbottle in his Beat Closer, pulls the handle three times and performs a powerful slash.
      • Lock and Cross-Z Dragon: The Beat Closer projects an energy version of the Bind Master Key before Cross-Z Charge slashes with it, creating a ball of golden energy before summoning a blue and orange energy chinese dragon that grabs the ball via its mouth, then flies at the enemy with an empowered attack.
  • Sclash Driver + Twin Breaker finisher: Cross-Z Charge can combine the powers of the Sclash Driver and the Twin Breaker to perform a powerful finisher. However, it puts a huge strain on Cross-Z Charge's body, causing his transformation to cancel.
    • Scrap Break/Let's Break (スクラップブレイク/レッツレイク Sukurappu Burēku/Rettsu Burēku): With the Twin Breaker in Attack Mode, Cross-Z Charge channels the energy of the Cross-Z Dragon or the RabbitTank Sparkling Fullbottle and performs a powerful slash.
      • Cross-Z Dragon: Cross-Z Charge summons a blue and orange energy Chinese dragon that flies behind him, and use it to stab the enemy before delivering a powerful punch with his fist covered in cyan and orange energy.

Appearances: Build Episode 17, Birth! KumaTelevi!! VS Kamen Rider Grease!, Build 18-25, 27, 29-30

Equipment

Devices

  • Build Driver - Cross-Z's transformation device.
  • Cross-Z Dragon - Slot adapter for Build Driver and personal familiar. After obtaining the Sclash Driver, it becomes the adapter for a Twin Breaker Finisher.
  • Cross-Z Magma Knuckle - Secondary slot adapter for Build Driver and secondary personal weapon.
  • Sclash Driver - Cross-Z Charge's transformation device (destroyed by Blood Stark with his Martian power)
  • Fullbottles - Cross-Z's Transformation trinkets.
  • Fullbottle Holder - Carrier strap for Cross-Z's Fullbottles
  • Dragon Sclashjelly - Cross-Z Charge's transformation trinket. Later, being overheated into a Dragon Magma Full Bottle.
  • Build Phone - Smartphone that transforms into the Machine Builder.

Weapons

Vehicles

Behind the Scenes

Portrayal

Ryuga is portrayed by Eiji Akaso (赤楚 衛二 Akaso Eiji), who previously portrayed Hiroki Nagase in Kamen Rider Amazons Season 2. As Kamen Rider Cross-Z, his suit actor is Eitoku (永徳 Eitoku), who returned in portraying "Secondary Riders" since Baron.

Etymology

The kanji used to spell his first name can poetically mean "I'm a Dragon" (竜我 Ryū ga).

Notes

  • Ryuga's characteristics are near polar-opposites of Sento Kiryu, as Ryuga possesses high-stamina prowess that can fend off inhumane monsters while lacking a standard-level intellect, while Sento possesses a genius-level intellect to create gadgets as part of his force but doesn't have Ryuga's high-level stamina or strength.
    • The duo often make some Manzai (漫才 まんざい) conversations, with Sento serving as the funny man (ボケ boke) and Ryuga as the straight man (突っ込み tsukkomi), as a way to reflect the characteristics.
Cross-Z Armorless

Cross-Z mid-transformation, appearing like a variant of Build

  • Kamen Rider Cross-Z's design is that of Build's Dragon Halfbody, made into a full Rider design with distinct armor added on top. Even his arms and legs are asymmetrical, as orange flames are added only to the limbs that aren't shared with Build.
  • Ryuga has some similarities to the previous character that his actor portrayed prior to Kamen Rider Build, especially in terms on how they first met their respective protagonists. Ryuga and Sento got off to a rocky start that is until the former decided to take refuge with him in order for Sento to figure out his lost memories. While Hiroki had a hard time in getting along with Chihiro at first; although he becomes more caring towards him as Amazons S2 progresses.
  • Cross-Z is the second secondary rider since Kaito Kumon and the other Gaim Riders to switch belts and upgrading his form (Cross-Z Charge).
    • His Rider designation's extension is similar to how Takatora Kureshima became Zangetsu Shin with the upgraded belt, except Ryuga's upgrade came directly from his original form, while the basis for the Lockseed differed from the upgrade.
  • Cross-Z is the first secondary rider to have a dragon motif.
  • Cross-Z's Dragonic Finish is performed almost exactly the same as Kamen Rider Ryuga's Final Vent attack from Kamen Rider Ryuki (and less exactly like Ryuki's), a kick propelled straightforward by a large serpent dragon's blue fire breath. The only difference is whilst Ryuga uses the standard Rider Kick, Cross-Z uses a roundhouse Rider Kick like the one used by Kamen Rider Gatack.
  • Interestingly, Cross-Z and Gatack also have a few things in common:
    • They have asked the primary rider of their respective series (Kabuto and Build) to defeat the respective series kaiju that is dear to them (Burn Smash for Cross-Z and Bellcricetus Worm for Gatack)
    • They use the same belt as the primary rider of their respective series to transform (Build Driver and Rider Belt) with the difference being either the color and/or the transformation trinkets.
  • Cross-Z's using the Sclash Driver becomes Cross-Z Charge is unique in two aspects:
    • The form's head armor is essentially just liquid formed over a round shell, yet has roughly the same sculpt of the previous form, unlike previous upgrades where the Rider's helmet is altered or designed to include new elements.
    • It is the only upgrade form debuting in the main series which lacks prerequisites to access (Ryuga already possessed both a necessary Hazard Level, and the components from Sento building the Driver/creating the Sclashjelly), while still being able to use the same system as the main Rider. The new system used hence functions as an upgrade.
  • Cross-Z Magma has two aspects that separate it from Cross-Z Charge:
    • Contrast to the Charge variant's water (liquid) themed, Magma is fire themed.
    • The form is likely based on Burn Smash, which it's essence is used to make the original Dragon Fullbottle. Furthermore, both Cross-Z Magma and Burn Smash had same color scheme.
  • Similar to the last upgrade of the Ixa System, Cross-Z Magma appears as a near-complete overhaul of the Rider form, while possessing a weapon responsible for the transformation.
  • Ryuga is the first rider to have a Final Form that required the source of the Super Form to be sacrificed in order to be accessed.

Appearances


References