Ryuichi Sakuma

Ryuichi Sakuma (佐久間 龍一) transformed into two Another Riders, Another Fourze (アナザーフォーゼ), derived from Kamen Rider Fourze Base States, and Another Faiz (アナザーファイズ), derived from Kamen Rider Faiz.

Character History
In 2003, Ryuichi was a student at Ryusei School and the boyfriend of Karin Yamabuki. When Karin was killed in a car accident, the Time Jacker Ora appeared before Ryuichi and offered him an Another Rider contract that would save Karin. He immediately accepted and was transformed into Another Faiz, causing Kamen Rider Faiz's existence and history to disappear. Using the power of Another Faiz, Ryuichi kidnapped and transformed female high school students sharing Karin's age and astrological sign (Libra) into life energy that would keep Karin alive, making her transfer to different schools whenever his actions became too conspicuous.

In 2011, Ryuichi's power as Another Faiz began to fade, causing him great distress. Sworz, another Time Jacker, came to him and granted him another contract that warped Ryuichi into Another Fourze, erasing Kamen Rider Fourze's existence. Renewed and upgraded, Ryuichi continued to kidnap girls and keep Karin alive.

In 2018, while Sougo Tokiwa, Geiz Myoukouin, and Tsukuyomi were investigating the disappearances caused by Ryuichi, currently at Amanogawa High School, Masato Kusaka attempted to kill Karin by throwing her off of a roof, drawing the attention of Sougo, Geiz, and Tsukuyomi. Ryuichi caught and saved Karin, but was confronted by Sougo and Geiz, and fled after a brief fight with Zi-O and Geiz BuildArmor.

Sougo and Geiz later traveled to 2011 to stop Ryuichi's first attack as Another Fourze, and Ryuichi was defeated by Zi-O FourzeArmor. However, his original contract as Another Faiz reflected the defeat and allowed Ryuichi to maintain his Another Fourze powers.

In 2018, Karin stopped Ryuichi from taking another victim, tired of surviving off of the stolen lives of others. Masato Kusaka then appeared and again attempted to kill Karin, to relieve her of the life imposed on her by Ryuichi. Ryuichi retaliated by attempting to choke Kusaka to death, but was thwarted by Takumi Inui, and fled soon after. With the situation explained by Kusaka, Geiz traveled to 2003 with the Faiz Ridewatch to stop Ryuichi's first attack as Another Faiz, while Sougo stopped his first attack as Another Fourze in 2011. Ryuichi was simultaneously defeated as Another Faiz by Geiz FaizArmor, and as Another Fourze by Zi-O FourzeArmor while Karin pled with him to let her die. At last, Ryuichi understood and accepted that his power was only making Karin suffer even more. With one final embrace, he bid farewell to the one he loved as she disintegrated out of existence. What happened to Ryuichi afterwards was unknown.

Portrayal
Sakuma is portrayed by Atomu Mizuishi (水石 亜飛夢), who previously portrayed Crow in Garo: Makai no Hana. As Another Fourze and Another Faiz, his suit actor is Eitoku (永徳).

Appearances

 * Icon-zi-o.png Kamen Rider Zi-O
 * Episode 5: Switch On! 2011
 * Episode 6: 555・913・2003