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|“||I shall become the first Kamen Rider||„|
Finis was portrayed by ex-Nogizaka46 and AKB48 member Rina Ikoma.
Finis is a Time Jacker of unknown origin who surfaced some time after Swartz's defeat. To do this, Finis enacted a scheme to steal the powers of Sougo Tokiwa, beginning by rewriting the history of the World of Zero-One to prevent the Daybreak Town Incident from happening.
Traveling to 2007, right before the Ark was set to launch, Finis gave Will the Zero-One Anotherwatch, granting him the power to transform into Another Zero-One and causing Aruto Hiden. With his Another Rider powers, Will ensured that the Ark launch was a success, allowing him to broadcast a messaging calling for all HumaGears to rise up against humanity. Will then murdered Korenosuke Hiden several years before his death in the original timeline and usurped control of Hiden Intelligence, commanding the HumaGears to go out and exterminate the humans.
To prevent Finis from rewriting history, Sougo Tokiwa, Aruto Hiden and their allies traveled to 2007 to prevent the Ark satellite from launching, but Aruto and Soreo Hiden were unable to get past Will as Another Zero-One in time to stop the launch. Sougo went to confront Finis, only for Finis to reveal that Sougo coming to the World of Zero-One was all part of her plan to lure Sougo to her so she could steal the powers of the Heisei Riders he collected. Taking their powers from Sougo, Finis used them to create the Ichigo Anotherwatch and used it to become the colossal Another 1, declaring that she would rewrite the history of the Kamen Riders. Sougo and Geiz attempted to stop her, but Another 1 overpowered both of them and damaged Geiz's Time Mazine, forcing them to escape in Tsukuyomi's Time Mazine.
In 2019, Finis was confronted again by Sougo and transformed into Another 1 to fight him once more. Declaring the powers of the Kamen Riders to be intended to destroy humanity, Finis summoned Geiz's Time Mazine and merged with it to become Another New 1. Finis initially overpowered Sougo as Zi-O, but after Aruto arrived and Sougo transformed into Grand Zi-O the two combined their powers to destroy Finis.
- Finis is the second Time Jacker to serve as the main antagonist of a Movie War crossover film, following Tid in Kamen Rider Heisei Generation FOREVER. Like Tid, it is unknown what connection Finis has to Swartz. Interestingly, while Tid was the villain of the final Movie War of the Heisei era of Kamen Rider, Finis is the villain of the first Movie War of the Reiwa era of Kamen Rider.
- Finis is the second villain in the Kamen Rider series to be portrayed by a former 48 Group after Ryoka Saiga, who was portrayed by ex-SKE48 member Rena Matsui.
- Like Matsui, Ikoma is a long time fan to the Kamen Rider series.
- The design of Another 1 is very similar to Kamen Rider Core's Bike State.
- Another 1 is the 2nd Another Rider to be rendered by using CGI following Another Kuuga.