柊 愛希

A childhood friend of the missing Yoshiyuki Tanabe.

She has a strong sense of justice and a cool personality that is not easily shaken by things, but when it comes to Yoshiyuki, her feelings waver.

In order to find clues and reasons for Yoshiyuki's disappearance, she goes to Gongo Gakuen after school and talks to the students.

She is single-minded in everything she does and is stubborn enough to not give up on anything she has decided on until it is complete.