Yuu Ishigami

He is the treasurer of the student council of the Shuchiin Academy.

Yuu is a reserved and somewhat gloomy student who would rarely show up to the student council meetings, preferring to do most of his work at home. He normally spends most of his time playing video games by himself, as he is generally be disliked by the other students due to an incident that occurred in his past.

(Source: MyWaifuList)