Nijigasaki High 1st year. Loves cute things. Her admiration towards school idol is stronger than others. Hates losing, she will get angry if called by nickname "Kasu-kasu". * PS: Kasu-kasu is a portmanteau of two last syllables of her last name (Nakasu) and two first syllables of her first name (Kasumi). "kasu" can also mean leftovers, byproduct, worthless; which is why she easily gets angry if teased by this nickname.