Ikushima is a second-year high school student of Prefectural Sanada East Girl's High School and a member of its wrestling club. She is a member of the Funky High School Girls and is close friends with Yanagi and Habara, although they all deny that they get along well. She is also a known friend of Girl A of their school's student council, and an acquaintance of Yassan. While she usually goes along with Yanagi's antics, Ikushima acts as a foil to her friend and they fight each other the most. Among her friends, she is the most interested in the opposite sex, partly due to the fact that she goes to an all-girls school. She has a crude attitude albeit less vulgar than Yanagi.