Rinji Amatori

"Since then, she's afraid of asking for help from other people. This became a trauma."

- Rinji, about Chika.

Rinji Amatori (雨取 麟児) is Chika's older brother, and Osamu's former tutor.

Appearance
Rinji has slick, neck-length black hair, and also black eyes.

Personality
He seemed to be quite caring about Chika, as he explained to Osamu the pain Chika went through after losing her friend.