Setsuna Yuki 優木せつ菜

Setsuna Yuki is one of thirteen members of the Nijigasaki High School Idol Club. She was the leader and founder of the original group and is a member of A・ZU・NA, a subunit under Nijigaku. She is a second year student and her color is scarlet red. The name "Setsuna Yuki" came from the characters of a light novel that she read.

Setsuna is passionate and headstrong, but kind and mature. She has a habit of taking on too much work and not wanting to burden friends with her problems. Setsuna has an unwavering passion for school idols and her raw emotion combined with a powerful voice is her charm point. She is the student council president of Nijigasaki High School.