Rurina is a firstyear student currently attending Nangokuren High School. She was a chairwoman of the Disciplinary Squad of Nangokuren High School along with her twin sister Rumina. 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 Kousuke 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 Rintarosama.She also tends to get envious when any girl gets close to him.