Kurusu Sakuya

A third-year student whom is a published author specialising in historical fiction. She goes by the pen name Sakurazaka Chris so other students are unaware of her fame.
Six months before the start of the game, Tatsuya points out a historical innacuracy in her novel and so she now makes him proof-read her writing.

Sakuya appears to be a cool, refined girl but has a mischevious side and can occasionally show her true feelings towards Tatsuya.