|Anime Debut||Season 1 Episode 6: School Festival!|
Kazuko has been Yui Hirasawa's classmate in at least their first and last year of high school.
Kazuko has remarkable long brown hair which is tied up to a thick ponytail, falling down to her hips and over her shoulders. A single strand also falls down her forehead. Her eyes are brown too. Over them, she wears round, rimless spectacles. As a Sakuragaoka High School student, she is usually seen wearing the school's uniform properly with black socks.
- During the first broadcast in the Japanese television, Kazuko wasn't show during the official class photo. However, she was later added in the Blu-Ray version.