Singularity Point

are humans with the ability to exist independently of time itself, and be unaffected by changes in their own past. 
==Overview==
This ability also allows them to suppress an Imagin's will when it takes over their body and is not tempted by the free wish an Imagin can grant. Because of this, the Imagin contracted to Singularity Points are usually unable to take a physical form in the present time, and directly possess their Singularity Point, instead. They usually reside within time itself and when they are not possessing their Singularity Point, they stay on any of the Time Trains, such as the DenLiner or the ZeroLiner. The Singularity Points also have the ability to become Kamen Riders, and the Imagin that possess them lend their abilities in combat when called upon. In other instances, the Imagin use their Singularity Point's body as they wish when the Singularity Point loses consciousness. As long as the Singularity Point is conscious, he can expel the Imagin from his body and send it back to the Train of Time that he uses as a Kamen Rider.
Furthermore, only Singularity Points, or Imagins who are possessing Singularity Points, can transform into Kamen Rider Den-O.
==List of Known Singularity Points==
===Natural Born===
*Ryotaro Nogami
*Hana
*Kotaro Nogami
*Owner
*Naomi
*Kai
*Shingo Hisanaga
===Temporary (through DenLiner)===
*Eiji Hino
*Ankh
*Junichiro Tokiwa
*Sougo Tokiwa
*Anna
===Others with Similar Abilities===
While the term was only used strictly within the confines of Kamen Rider Den-O canonicity, several characters throughout the franchise have similar powers that protect them from temporal changes in the timeline.
*Kohtaro Minami - through the Kingstone as shown in Episode 41
*Kazuma Kenzaki and Hajime Aikawa - revealed during the Kamen Rider Blade 20th Anniversary STAGE&TALK to have retained their memory of the events of Kamen Rider Zi-O even after Sougo Tokiwa had erased their memories. 
*Tsukasa Kadoya, Daiki Kaito, Yusuke Onodera, and Natsumi Hikari - protected through their inter-dimensional traveling abilities
*Kouta Kazuraba and Mai Takatsukasa - due to their status as Helheim Gods, though the protection is only temporary and erasure will imminently take effect. 
*Aruto Hiden and Is - through protection by Satellite There, their memories were left unaltered.
*Ace Ukiyo - through his divine status as the God of Genesis, as he was unaffected by Suel's temporal reversal ability.
===Indirectly===
*Rentaro Kagura, Rento Makina, and Over Quartzer's Zero-One - immune to timeline alterations due to Sougo's dreaming abilities
*Mondo Douan - retained his memories and remained immune to temporal erasure by both Another Quiz and the Quiz Miridewatch for unknown reasons
*Michal Minato - implied only, as he still remembers Eiji Hino's words even though OOO's timeline was altered.
*Woz - unknown reasons, though most likely due to his involvement with Quartzer, a time-traveling group.
==Notes==
*With the exception of Den-O, by default none of the main Kamen Riders are Singularity Points, meaning they can easily be defeated through alterations in the timeline that would either negate their birth, prevent them from receiving their powers, or turn them into a different person entirely. An exception would be if such Rider was accompanied by a Singularity Point when named event occurs or if the Rider's gear has properties that can protect them from space-time anomalies (Ex. the Shift Cars), though they will ultimately lose the immunity once they lose contact with said gear or Singularity Point, as shown with Eiji Hino when he returned to his own timeline and lost both his powers and memories when Another OOO was created. 
==External links==
*Kamen Rider Zukan page on Singularity Point.
Category:Kamen Rider Den-O