Sodachi Oikura

Araragis childhood friend. She is a student with a strong sense of competitiveness which led to her popular nickname much to her chagrin. Sodachi was the president of a firstyear class where both Hitagi and Koyomi also belonged to. At school she wanted to be called as Euler but ends up getting the nickname How Much a pun on her surname oikura and a reference to her personality.