Yanagin's Senior

Yanagin's senior is a third-year student of Sanada Central High. She is often seen hanging out with the High School Girls are Funky trio at Habara's house as a mentor of sorts, where she tries (usually unsuccessfully) to help them amp up their 'high school girl power'.

History
Yanagin's senior attended elementary school with Ikushima's senior and Habara's senior. In third grade, the former's lunch money was stolen, and Habara's and Yanagin's seniors were blamed for it. The two claimed innocence and accused each other of being the culprit, but the matter was never resolved. This ended up causing a long-standing animosity of almost a decade between them. In reality, Ikushima's senior had just misplaced the money.

Appearance
Yanagin's senior is relatively tall and broad-shouldered. She has black eyes and keeps her waist-length black hair untied, with bangs falling about her face. She is usually seen wearing the Central High uniform, without the coat and ribbon.

Personality
Like her junior, she is loud, energetic and rather easy to anger. She doesn't hesitate to pick crass verbal fights or even get physical. She is also full of unique notions about high school girls and why they are popular.

However, she does have a forgiving side and is willing to drop her grudge after it was cleared up. She also feels remorseful about the harm she has caused others in the past, as in the case of Karasawa.

Trivia

 * She placed 52nd in the popularity poll with 19 votes.
 * She bears a resemblance to the Student Council President of Central High, but there is no evidence confirming them to be the same person. In fact, the two have separate entries in the poll.
 * In HSGF-16, the trio mentions a certain 'Kawamura-senpai' who is indicated to get angry very often, which could refer to Yanagin's senior.