Rurina

Rurina, also known as Chikōfū, is the former vice-chairwoman of the Disciplinary Squad of Nangokuren High School, along with her twin sister Rumina. Rurina is an average young woman with shoulder length blonde hair with some covering her right eye, thin eyebrows, and a ribbon in her hair. She wears a red button down vest over a button down white shirt, a dark colored skirt with two yellow lines, black socks, and black shoes. She also wears a yellow scarf and a yellow armband with the kanji for wind on her left arm. She also carries a sword. After her clothes are ripped by Rintaro, she along with her sister wear school swimsuits. Rurina is shown to be serious and abides by the rules of Nangokuren High School. She is rumored to be super sadistic along with her sister, and has the will to attack anyone who breaks the rules. She is also loyal to Asuna, as she stopped attacking Rintaro, Tamao, and Kōsuke because Asuna told her to. She is also willing to extort money for Asuna as well. She developes a crush on Rintaro after he defeats her and stalks him (even calling him "Rintaro-sama").She also tends to get envious when any girl gets close to him.