|Debut (Manga):||Chapter 1|
|Debut (Anime):||Episode 1|
|Appears in:||Manga, Anime|
|Japanese Voice:||Eri Kitamura|
|English Voice:||Carrie Savage|
Rimi is a teenage girl with long, pink-hair with a dark pink hair ribbon at her left side of her head. She wears the same uniform as Takumi 's sister, Nanami and the other girls. She has two dark pink eyes.
Rimi is shown as a cheerful and kind girl, acting as a friend and support for Taku. It is later shown that her actions were to prevent Takumi from awakening, saving Shogun (The General). However, she claims to be his genuine friend, and has always cared for him.
Rimi is a mysterious pink-haired girl that Takumi encounters at the crime scene of the New Gen staking murder on his way home. At that time, she was wearing Suimei Academy' s uniform and appeared to recognize Takumi. The next day she sits next to him in school, and shocked by his apparent fear of her, she claims to have known Takumi for a long time, and that she is his childhood friend, something that only Takumi seems to be unable to remember. She is revealed to be a Gigalomaniac. After revealing to Takumi that he is just an illusion created by the real Takumi, she leaves to save his sister. However she is captured by Genichi Norose. Takumi then saves her, and is shown kissing her at the end of the anime.
Rimi Sakihata also appears in (Phantom breaker EXTRA) as a secret playable character, In order to unlock her you have to get 15+ stars in battle situation mode using gaito in situation battle mode,