|Anime Debut||Season 1 Episode 1: Dissolution!|
Yōko has been Yui Hirasawa's classmate since their first year in high school. She is a gentle and quiet girl, but when she becomes fixated on something, the world around her disappears. She is a bona fide member of the Mio Akiyama Fan Club and also the only one from Class 3-2. Her admiration for Mio knows almost no limits, but Mio's "extremeness", as Ritsu Tainaka called it, is also too much for Yōko to handle.
Yōko is a girl of average height with long green hair which is tied to two braided pigtails, falling over her shoulders. The end of each braid is decorated with a yellow hair tie. Her eyes are yellow. As a Sakuragaoka High School student, she is usually seen wearing the school's uniform properly with grey socks.
- During the first broadcast in the Japanese television, Yōko wasn't show during the official class photo. However, she was later added in the Blu-Ray version.