Ootsuki Koto is a supporting character. Eiji's Childhood friend and an acting older-sister.
Koto is blessed with natural beauty. She has wide, blue eyes, and long, straight, pink/violet hair. She is usually seen wearing a school uniform.
Ootsuki Koto is mischievous and playful, often hanging out around Nanako and Eiji, teasing them every now and then. She often gives Nanako advise whenever Nanako asks for help.