|This article is about a/an ally in the Kamen Rider Series.|
Mari (マリ) was a girl living with Keisuke Jin, whom she calls grandfather (おじいさん ojisan), on a hospital near the ocean. According to Keisuke, she was waiting for her father, who is missing for some reason. She was protected by Takumi Inui (Kamen Rider Faiz) and his Auto Vajin when they were attacked by the forces of the revived Badan Empire, before Jin transforms into X-Rider and attacks him. In aftermath of the film, she was seen assisting Jin on treating his patients.
Behind the scenes
She shares her given name with a character from the Kamen Rider 555 series, Mari Sonoda, in homage to the series along with the return of actors Kento Handa and Kohei Murakami as Takumi Inui and Masato Kusaka respectively, ten years following the end of 555.
Mari was played by Ai Miyoshi (三好 杏依 Miyoshi Ai).