Anime version

Tōtaku's strategist and adviser. While short-tempered and a serious bespectacled girl, she has not got the heart to say no to her childhood friend Yue.

Visual Novel Version

The To strategist and Yue's best friend from childhood. She becomes irritated when Yue opens up to Kazuto, but cannot say no to her. She has some interest in Kazuto, but is always too angry and proud to show it.

(wikipedia.org)