Futaba Yuiri

A first year in the school who's in the same class as Mayuri. She looks up to Souji who's very reliable, and fondly calls him "onii-san". She is also an old acquaintance because she was Mayuri's friend when they lived in another city in the past.

Her father has remarried and she has a new family. She strongly looks up to her older step sister Saki who is great at all sports, has great grades and is the club president of the tennis club. She always follows her sister while going all "onee-chan, onee-chan", putting her older sister off a little.

However, Yuiri acts very shy towards everyone except for her older sister, and wants to become more assertive... ending up going a little berserk, then happens to immediately be at her wits' end.