He was voiced by Atomu Mizuishi.
After his girlfriend Karin was killed in a car accident, Ryuichi Sakuma fell into despair and made a deal with the Time Jacker Ora, who told him he could save his girlfriend by accepting her contract. Sakuma agreed to the contract was transformed into Another Faiz. Another Gaiz then began converting people sharing Karin's age and astrological sign into life-energy to give her an artificial life-span.
However, in 2011, Sakuma's power as Another Faiz disappeared. The Time Jacker Sworz then came to him and made a deal with him for him to be transformed into Another Fourze.
After being defeated by Kamen Rider Zi-O using the Fourze Armor, the remnants of the Another Faiz powers resurfaced and transformed Ryuichi into him once again.
Another Faiz and Another Fourze were later battled by Sougo and Geiz using the Fourze and Faiz Ridewatches respectively, in both 2003 and 2011 and succeeded in destroying each era's Another Rider. His Another Rider powers gone, Ryuichi realized that his power was only making Karin suffer and bid a final farewell her right before she died.