Kamen Rider Diend (仮面ライダーディエンド,Kamen Raidā Diendo?) is one of the fictional characters and secondary Kamen Rider in the Kamen Rider Series of Kamen Rider Decade. His name comes from the English words "die" and "end", as well as "the end".
Daiki Kaito (海東 大樹, Kaitō Daiki) is a mysterious young man who is portrayed as being cheerful to the extent of being annoying to those around him, but becomes serious in battle and sees material objects as more important than anything else. Narutaki, aware that Daiki is Diend, avoids getting in his way. He also appears to know about Tsukasa's past, referring to sea cucumbers as being something Tsukasa had always wanted to taste. He travels from A.R. World to A.R. World, stealing what he refers to as "treasures". Daiki's surname is a homophone of the Japanese word kaitō (怪盗?, phantom thief), a role he fulfills in Decade.
It is revealed that he comes from an A.R. World (referred to as the "World of Diend") where he was an officer who served the evil Fourteen who has deemed Kamen Riders as threats to the public peace. Daiki hunted them down and turned them in for education until he captured the leader of the Kamen Riders: Kamen Rider Glaive. When Glaive is unmasked, he is revealed to be Daiki's older brother Junichi.
By then, Daiki learns the truth that Fourteen brainwashes people, powerless to stop him. Losing his self-confidence and seeking to undo all of the mistakes he had caused, Daiki stole the Diendriver from Dai-Shocker, becoming Kamen Rider Diend and becomes Fourteen's new most wanted Kamen Rider.
He leaves his world, traveling to other worlds and taking their treasures as a means of self-delusion until he crosses paths with Kamen Rider Decade. Eventually, he does lackadaisically accept the Hikari Studio residents as "friends", even calling Decade a "comrade", though he is not beyond abandoning them without explanation, usually for his own self-interest.
Though he briefly appeared in Blade's World, revealing he knows Tsukasa, Daiki found nothing worth taking. Arriving in Faiz's World ahead of Tsukasa, Daiki witnesses Faiz's battle with the Butterfly Orphnoch and was unable to catch him to acquire his Faiz Gear. When Tsukasa arrives in Faiz's World, Daiki reveals that Faiz is among the student body and warns him not to meddle in his affairs. However, as Tsukasa decides to find Faiz, Daiki gets Lucky Clover's aid by showing them the photograph that Faiz dropped during the fight under the assumption he wanted to join their group, leaving them to attack Yuri before Takumi becomes Faiz to protect her. Daiki then attempts to run away from school, but realizes that he needs to stay and make sure the belt is in proper hands.
When the Orphnochs acquire the belt, Daiki reveals his true intentions as he becomes Diend. He kills the Centipede Orphnoch before he and Decade fight over the Faiz Gear until Takumi regains it, later disposing of it. But in spite of being told Takumi had something more precious than the Faiz Gear, Daiki takes the Ride Booker from Tsukasa in an attempt to take the Faiz Gear from him. Narutaki whisks Tsukasa away to fight Kamen Rider Ryuga, but Daiki interrogates Kivala on the location to save Tsukasa, claiming that the Faiz Gear is what he came for as he gives Tsukasa back his Ride Booker.
However, during the Lucky Clover invasion of the Smart Brain School, Daiki returns once again to Tsukasa and Takumi's aid, returning the Faiz Belt to Takumi. After the fight, Daiki claims the Orga Gear for himself out of rubble while seeing it as the "more precious treasure" Tsukasa spoke of, leaving a little note on the painting of Agito's World as a warning not to meddle in his affairs again, which further irritates Tsukasa.
In Agito's World, Daiki is training along with Yuusuke and others to become the next G3-X user. Acquiring the position, it is only revealed later that Daiki's real goal in Agito's World is to steal the newly-created G4 chip that was stored in Ashikawa's locker, Yuusuke confronts him until Toko arrives and blasts the chip to bits. Daiki later aided Yuusuke in protecting Ashikawa, only to find out what he possessed to be more precious than the G4 Chip. However, seeing that to be his Agito powers, Diend leaves the fight scene to the next world as he could not take it with him.
In Den-O's World, Kaito attempts to coax the Imagin Momotaros, who took Yuusuke's body, into allowing him to use a Final FormRide card on him to become a DenLiner. When M-Yuusuke refuses, he is runned ragged by Diend until he leaves him to reconsider his offer.
However, when he offered again, Decade takes the card from Diend while defending Momotaros before helping him regain his self and form. Sticking around Den-O's World, Diend sneaks aboard the DenLiner to the past where his summoned Riders were used by Urataros, Kintaros, and Ryutaros.
In Kabuto's World, interested in the Clock Up ability of the Kamen Riders, Diend saves Decade from TheBee and Gatack, fighting the latter by himself as he is further impressed by the Clock Up System and proceeds to get it from Kabuto. But after the attempt blew up in his face, Daiki receives a "treasure" from Tsukasa which was actually a vial of pepper.
In Hibiki's World, after an attempt to rob Hibiki, Daiki learns from Asumu of the three scrolls owned by the three Oni schools. Working his way in Zanki's school, he makes a preposition to aid him in settling things with Ibuki and his school. However, during the fight with Decade, Diend reveals his true colors after stealing the Zanki and Ibuki school scrolls and having Momotaros cover his escape. He then admits to get the last scroll from Hibiki who blocks his path and gives him his Onkaku to give to Asumu along with his final request. The next day, Daiki uses Asumu to distract Hibiki lost enough to steal the scroll, invoking the man's change into Gyuki to cover his escape. However, after reading the scrolls, Daiki returns to give Asumu the Onkaku in order to see the harmony of the three Ongekidō styles. He takes his leave soon after, though thanked by Asumu and the others in spite of his protest that his motives were selfish.
He is seen again in the Negative World, following Tsukasa before he overheard Otoya speaking of treasure that attracts the thief into fighting alongside Decade against the Dark Riders. Though he gained the treasure (through the use of paper airplanes), the K-Touch, Diend loses it during the fight.
Returning to his home world, Daiki meets up with his old friends Haruka and Shin as they fight Darkroaches as Larc and Lance, the latter blaming him for Junichi's brainwashing. Tsukasa approaches Daiki after Natsumi and Yuusuke have also been brainwashed by the evil Fourteen, and Daiki agrees to help Tsukasa, Haruka, and Shin defeat Fourteen and his brother who can transform into Glaive. Together, they reveal Fourteen's true form as Jashin 14 and destroy him, freeing everyone from brainwashing. However, Junichi revealed he was never under Fourteen's control and was working for him on his own free will. Diend and Glaive fight, though neither has the will to kill the other, especially after Tsukasa tells them that brothers must look after each other, no matter what.
Junichi and Daiki go their separate ways as Daiki travels to the next world, with the intent to obtain the Shinkengers' Origami. Starting with Genta Umemori'sIka Origami, Daiki runs off with Genta in pursuit. Deciding to fight him as he cannot lose him, Daiki gets an unexpected visit from Chinomanako who steals his Diendriver and hounds him until he makes his way to Tsukasa who has Yuusuke take him back to the Hikari Studio. He eventually gets it back from ShinkenGold when Chinomanako is destroyed by the combination of Decade, Kuuga, and the Shinkengers in exchange for the origami he stole.
In BLACK RX's World, Diend's next attempt treasure is the Perfecter from Apollo Geist, whom Tsukasa used it to restore Natsumi into life.
In Amazon's World Diend appears again looking for the GaGa Armlet. Diend manages to infiltrate the Dai-Shocker base and learns the armlet is in the possession of Llumu Qhimil. He joins Decade and Amazon in a fight against the ten faced demon and after GiGi Armlet is stolen from Amazon, Narutaki presents Kaito with a card that will make Diend stronger on the condition that he defeats Decade. Kaito takes the card but says that there are other options as well. Kaito then appears to tell the Hikari Gang that the boy who stole the GiGi Armlet, Masahiko is being subjected to Dai-Shocker's Human to Monster project. Diend then battles with Decade and Amazon having recovered the GiGi Armlet and manages to steal the GaGa Armlet from Llumu Qhimil until Decade uses an Attack Ride Card to take it from him. The riders then destroy Llumu Qhimil and Diend joins the Hikairi Photo Studio as a traveling partner into another world. They end up in the worst possible world as they enter the World of the Rider War from Natsumi's nightmare.
In the World of the Rider War Diend helps Asumu kill off Saga and his Fangire minions. Asumu explains to Daiki that there are some treasures that should never be taken. When Tsukasa goes to save Natsumi, Kaito appears to tell him about the trap Super Apollo Geist has planned but Tsukasa goes anyway, promising Kaito that if he dies Kaito can have the world. Diend helps Tsukasa fight Super Apollo Geist and the revived Kaijin even giving him a Diend Final Attack Ride to destroy Geist. But when the Rider War commences he shoots Decade at point blank range marking future battles.
After Decade is destroyed he and Natsumi meet Wataru Kurenai who explains Decade's role as a substitute for the riders of the A.R. Worlds. When Tsukasa is revived, Diend joins the fight against Super Shocker. After the struggle he is seen with the Hikari Studio gang posing for a picture.
Kamen Rider × Kamen Rider × Kamen Rider The Movie: Cho Den-O TrilogyEdit
Diend reappears in Kamen Rider × Kamen Rider × Kamen Rider The Movie: Cho Den-O Trilogy. In the film Daiki allows himself to become possessed by a Relict Imagin in order to travel back in time to November 22, 2008, and steal a gold-plated gun from the Kurosaki family estate, a heist he failed to perform on that date in the past.
He allows the Spider Imagin to be destroyed and hitches a ride back in time on the DenLiner to attempt to cause a time paradox so he can be arrested by Kamen Rider G Den-O. This sets in motion a series of events that would allow Daiki to complete his plan, by getting his past self accidentally hit by Kurosaki and retrieve the golden gun before it gets damaged, thus putting it into his possession while opening his pursuer's eyes to what he should value more. Although his past self steals the golden gun from him and escapes, Daiki obtains a K-Touch from Kurosaki and gains his own Complete Form and destroys Kamen Rider G Den-O.
Kamen Rider DiEnd was part of a group of reinforcement riders led by Akira Date/Kamen Rider Birth to aid the primary riders in defeating the Rock Great Leader. All the Kamen Riders got on their bikes and performed the All Rider Break attack which destroyed the Great Leader. OOO, Den-O, All Riders: Let's Go Kamen Riders
Daiki and Tsukasa both appeared in a movie alongside the Gokaigers in a Super Sentai meets Kamen Rider, Kamen Rider × Super Sentai: Super Hero Taisen movie. As Tsukasa re-takes command of Dai-Shocker again to hunt down the Super Sentai teams, Daiki confronts Captain Marvelous and Dai-Zangyack hunting down Kamen Rider OOO and have a dispute on which of them would get a treasure. Unintentionally dragging Hina Izumi to the Dai-Shocker headquarters, Daiki meets Tsukasa who asks him to join Dai-Shocker. Daiki declines leaving with Hina and confronting Joe Gibken and Don Dogoier who had just lost their comrades to Decade. Joe recalling what Marvelous told him about Sentai and Riders attacks Daiki while Don and Hina break them up. Calming down after recalling that both sides lost comrades they get on the Gokai Galleon to plan their next course of action. With the idea of meeting Akarenger to prevent more calamities from happening, Daiki reveals a pudding cup he stole from Momotaros to hitch a ride on the Den-Liner to 1974. There they meet Akarenger defeating Baseball Mask and he comes with the heroes. However, once back in the present time, the remaining riders and sentai fight each other with Kamen Rider #1 and Akarenger revealed to only be Decade and GokaiRed in disguise. Betrayed by their former comrades, Joe and Daiki are supposedly killed by GokaiRed and Decade respectively. However, with the revelation that the deaths were just a trick to fool the evil organizations, the riders and sentai fight back. Unfortunately, Daiki actually a true antagonist and revealed everyone was sent to another dimension as a part of his plan, so he assembles Big Machine. In Big Machine, Daiki battles Go-Buster Oh until it became augmented by Kamen Rider Fourze's S-Switches and Big Machine gets destroyed. Badly injured, but surviving the explosion Daiki returns Tsukasa's camera and tells him to find his own path while accepting Tsukasa's friendship his way before taking his leave.
Kamen Rider Decade: The World of Tsukasa Kadoya ~The Garden Inside the Lens~Edit
In the novel which is the reimagination of the TV series, Kaito is given a tragic past and is a very confused and troubled man. His entire family is brutally murdered in front of him. Out of desperation Kaito begs on his knees, hoping he’ll be spared, even going as far as to lick the murderer’s shoes. He eventually gets tired of his world and seeks to find a new one, along the way he finds the Diendriver and ends up working for Narutaki and there’s no real explanation for any of this. Here, he has no interest for stealing treasures, but it is however dropped after Kabuto’s world.
Arriving at their final destination, the world of Kabuto, where they meet Souji Tendou, still as arrogant and confident as ever, and considers himself as the strongest Rider ever. The group enters Bistro La Salle where Hiyori Kusakabe works. Hiyori sees Kaito and Tsukasa, dressed as a ZECTroopers, claiming that the two of them ate without paying. Tendou hears this and is enraged. The three of them fight and Tendou actually beats them with only a pair of chopsticks. Turns out it was a pair of Worms that ate without paying. Tsukasa and Kaito are eventually captured by ZECT, only to have Tendou save them. Tsukasa thanks him and says that he never thanks people. Tsukasa starts respecting Tendou. For some inexplicable reason, Tendou has the Clock Up AttackRide Rider Card and gives it to Tsukasa after he realizes that he is Kamen Rider Decade. Tsukasa uses the Clock Up card as Kuuga, meaning the AttackRide cards aren’t restricted to their respective Riders in the novel. In the end, the Worms that impersonate both Tsukasa and Kaito have been defeated. As the fight is over the trio goes back to Tsukasa’s world.
Between all the traveling, a vampire has been attacking in Tsukasa’s world, leaving behind drained corpses. The group investigates and they find out that Narutaki is the vampire. Just like the group, Narutaki originally had his own homeworld, but abandoned it to find a new one. However, he’s been traveling for so long that his mind has been deteriorating and can barely remember who he really is. He was originally a human, but somehow in his journeys, he had lost his humanity. The Kamen Riders have a very pure energy that Narutaki seeks to consume: the Rider Cards. Thus, he sends Kaito to steal them for him. Kaito reveals his betrayal towards the team and gives Narutaki Tsukasa's 9 Heisei Rider Cards and Narutaki reveals his real form: a red-hued demon. Kaito suddenly has a change of heart, and sacrifices himself to save Tsukasa.
A few decades after Tsukasa and Natsumi's final confrontation with Narutaki, Kaito revives as an unchanged young man and reappears in front of an elderly Tsukasa. Kaito tells him it’s time to visit Natsumi’s world. There they are greeted by a young Natsumi, and Tsukasa finds himself as a young man again.
Kamen Rider Decade: The World of Tsukasa Kadoya ~The Garden Inside the Lens~
Diend only has access to a single form by using the Diend KamenRide Card in the Diendriver and then shooting the Diendriver above him. In this form, Diend can move extremely fast when he personally fights rather then use his KamenRide cards through the use of the microwave-emitting Tesla Bands around his wrists. Decade also has Tesla Bands, but does not use them. Diend can also perform the Blue Strike (ブルーストライク, Burū Sutoraiku) Rider Kick.
This form appears in Kamen Rider × Kamen Rider × Kamen Rider The Movie: Cho Den-O Trilogy; similar to Decade's Complete Form with the exceptions of movie based main antagonistic Riders being on his chest armor instead of the main or secondary riders. While Decade's is powered by the protagonist Heisei KamenRiders and their ultimate forms, Diend Complete Form is powered by the main antagonistic Kamen Riders of the Heisei Kamen Rider films (no Kamen Rider from a Den-O film is included):
In episode 12 of Decade, Daiki briefly deployed as G3-X to take out the Grongi with Yuusuke Onodera supporting him. During the fight, Kaito takes off the armor to finish the Grongi off as Diend, revealing that he only became G3-X for his own agenda.
Decade Decadriver which ressemble an ordinary belt(with card scanner),Diendriver ressemble a handgun which allow daiki to transform to Diend,attack the enemy & Also call antagonist heisei riders when daiki assume Complete form. to transform,diend just take his diend kamen ride card,insert it to his handgun&shot it upstair to complete the transformation. He can also use Decade final form ride to transform decade to become jumbo decadriver which he equip it to gigantic Kamen Rider J to make him turn to Giant Decade(which ressemble deacde complete form,but use decadriver instead of K-Touch)
K-Touch is an unique cellphones which allow decade/diend to assume their complete form. Unlike Decade who powered by Heisei riders (Ultimate form), Diend K-Touch powered by antagonist Heisei Riders (also included Kamen Rider Skull, but no rider from Den-O). To activate it, Diend pressed the button with sequences from (G4, Ryuga, Orga, Glaive,Kabuki, Causcasus, Arc, Skull)and pressed the FINAL KAMEN RIDE button (Diend symbol),he take the belt driver and replace it with his K-Touch,make him assume his complete form. To call and excecute final attack ride, he use the conscecutive cards. This Diend version of K-Touch was yet to released.
Exactly how and when Kaito stole the Diendriver from Dai-Shocker was never clearly stated, but many fans believe that when he ran away from his world, he stole the Driver while traveling and stealing treasure.
He is similar to Basco ta Jolokia from Kaizoku Sentai Gokaiger, as they both can summon Riders/Sentai from a device. However, what separates Daiki from the likes of Basco is that he doesn't have a monstrous form and that he's also somewhat redeemable.
He is the second Rider after Daisuke Kazama to use a gun to transform into a Rider.
Coincidentally, both Daisuke and Daiki are Cyan-colored Riders.
Daiki is the last secondary Rider to make his debut in an episode of his series, as the following secondary Riders make their debut as a cameo appearance in the Movie War films.