|This article is about a/an set of alternate forms in Kamen Rider Ghost.|
Newton Damashii (ニュートン魂 Nyūton Damashī, lit. "Newton Soul") is an alternate blue power-based form of the ghost Riders themed after Isaac Newton, the renowned physicist and mathematician who was responsible for discovering universal gravitation, thus giving the world proof of the existence of gravity. Accessed through the Newton Ghost Eyecon, this form bears the Persona Dynamics (ペルソナダイナミクス Perusona Dainamikusu) helmet with the Face Fall Apple (フェイスフォールアップル Feisu Fōru Appuru) faceplate. While it is mostly used by Kamen Rider Ghost, it can also be used by other Riders.
While assuming Newton Damashii, a Kamen Rider dons the Discovery Hood (ディスカバリーフード Disukabarī Hūdo) where they are armed with a pair of orb-like gloves that allows him to generate gravitational pulses for either knocking back enemies or weighing them down with crushing force. Alternatively, Ghost can instead use his gravity orbs as makeshift boxing gloves to deliver powerful punches.
As one of the 15 heroic souls, Newton Damashii's power is also channeled through the Grateful Damashii which is accessed by Ghost via the Eyecon Driver G, appearing on Grateful's Armor Sublime as the Newtonic Shoulder (ニュートニックショルダー Nyūtonikku Shorudā). 
In 2005, long after his death, Sir Isaac Newton was reincarnated as a Parka Ghost by the Ghost Hunters with help from Sennin. Among the 15 luminary ghosts assembled by the lead Ghost Hunter, Ryu Tenkuji, who personally picked them with his reasoning being that these figures were people whose lives burned the brightest, their purpose was to counter the Gammaizers, the 15 deities of the Gamma World, in preparation for the Gamma invasion of the human world. Vacant Ghost Eyecons were prepared for each of the luminary ghosts, however, with the unforseen betrayal of Chikara Saionji leading to Ryu's death and the dissolution of the Ghost Hunters, all 15 ghosts were left sealed in unique objects which pertained to them each and would not be freed until the Gamma invasion finally arrived ten years later.
Inexplicably appearing in defense of police forces against a numberless Cobra-Type Roidmude on August 8th 2015 - two months prior to Takeru's first death - Ghost, witnessed by Kiriko Shijima and Genpachiro Otta, assumed Newton Damashii to repel an attack from the Roidmude, proceeding to destroying it with his Omega Drive before fading away into the air.
In an evidently forgotten dream that Takeru had before his first death, the ghost of Newton as well as Musashi and Newton witnessed the arrival of a miniature spaceship which contained their Ghost Eyecons along with the Ore Eyecon whom exited after it arrived at a concert. Signaled by Sennin pointing to his illustration in a book of historical figures, Newton would be third in a succession of three Damashii which were used by Kamen Rider Ghost to fight the Gamma Commandos.
War with the Gamma
Faced with the predicament of the plummeting "Azuchi Castle", Ghost was given the Newton Eyecon by Yurusen who guided him into using its gravitational power to let it join the rest of the city safely while using his own ability as a ghost to phase through and avoid being crushed.
Confronting the Machine Gun Gamma, Ghost assumed Newton Damashii and used his gravitational power of repulsion to send the oncoming bullets back at the Machine Gun Gamma who escaped with a getaway driver.
Ghost used Newton Damashii to free Specter who had been buried under earth by Jabel.
- "Seeing the two of you has reminded me how a man of science should carry himself. Let us work together."
- ―Newton as he finally agrees to cooperate with Himiko.[src]
Ever since the appearance of Himiko's spirit, the Newton Eyecon would always fly away. This was, as explained by Himiko herself, due to the clash in the thinking of the two of them. However, both of them were able to put aside their differences, allowing Ghost to use their combined power to defeat Igor in his Gamma Superior Knife form.
Driven by his trauma in the Gamma world, Takeru's desperate attempt to use the Eyecons to make a wish again made all of his Eyecons in his possessions to leave him. Eventually, with Specter lending Takeru his Eyecons and Alain had his left him due to no longer being subjected, all Eyecons agreed to cooperate and contributed to the creation of Eyecon Driver G, allowing Takeru to transform into Ghost Grateful Damashii.
Corresponding color-wise to Zyuoh Shark, Newton Damashii was first in a succession of three Damashii which were assumed by Ghost in his fight with the Shocker cyborg Shiomaneking in the presence of the Zyuohgers. Newton was subsequently brought forth amongst all fifteen heroic Parka Ghosts as Ghost Grateful Damashii performed the Grateful Omega Drive kick to defeat Shiomaneking.
Newton was defeated alongside Robin by Adel Arrow during the disastrous engagement against Adel and his 11 remaining Gammaizers by the 15 Heroic Ghosts and Ghost Grateful Damashii, having chosen not to rely on Mugen Damashii's power alone while facing the Gammaizers. Viewing themselves as now obsolete, the heroic ghosts would enter a brief period of unresponsiveness before soon enough returning to Takeru's side, as he asserted his faith in them, against Gyro.
Village of Heroes
Attacked by Dark Necrom R and Dark Ghost, Ghost was robbed of his Eyecons which were taken as part of Argos' machination. When Takeru and his friends followed them to the Island of Eyecons, Newton was found to be living in harmony as one of 100 reincarnated historical figure within the Village of Heroes. When Argos' Gamma forces attacked the village, Newton was struck down and reduced back to an Eyecon which was recovered along with the others by Argos. Gathering all 100 heroic Eyecons, Argos used them as a sacrifice along with Darwin's power of evolution to convert Takeru's dead body into a vessel for the ultimate Eyecon, the Extremer Driver, which he intended to use to fulfill his ultimate agenda of converting all life on both Earth and the Gamma World into ghosts. Ultimately, however, Takeru was able to gain the strength of the 100 heroes along with his friend's spirits, allowing him to defeat Argos seemingly at the cost of his own existence only for the 100 heroes to use their power to restore his soul with the original fifteen heroes returning to his side as he came back to Earth.
The Dr. Pac-Man Incident
When Ghost faced the Hatena Bugster, Newton was brought forth among all fifteen heroic spirits with the Eyecon Driver G only for the Bugster to repel even the God Omega Drive; Takeru would ultimately resort to a new power.
Newton possesses Narita in the stage show, assuming his Kamen Rider Ghost form.
- Kamen Rider Ghost (Surprise Future, Special Preceding Video, Ghost Episodes 4, 5, 8, Ikkyu Eyecon Contention!, Ghost 11, Ikkyu Intimacy!, Ghost 15, Zyuohger Episode 7, Ghost 38, Heisei Generations FINAL: Build & Ex-Aid with Legend Riders)
- Toucon Boost (Ghost Change)
- Grateful Damashii (Ghost Episode 23, Zyuohger Episode 7, Ghost 38, Heisei Generations: Dr. Pac-Man vs. Ex-Aid & Ghost with Legend Rider)
- Mugen (Ghost Change)
- Kamen Rider Specter (Kamen Rider Battle: Ganbarizing)
- Deep Specter (Ghost Change)
- Kamen Rider Necrom (Kamen Rider Battle: Ganbarizing)
- Kamen Rider Dark Ghost (Ghost Change)
Behind the scenes
- Newton running away because of Himiko's ties with mysticism is rather presumptuous, for Sir Issac Newton was a man of faith who believed in the existence of a benevolent God, even if he did privately profess ideas that would have been considered heretical in his day.
- Discounting the Grimm and Sanzo Damashii which belong to Necrom, Newton is the only one of the remaining thirteen heroic Damashii to have ultimately never been used with either Ghost or Specter's upgraded Transients (Toucon Boost and Deep Specter) on-screen.
- Gammaizer Gravity, Gammaizer counterpart