Jean

Basics
Jean is one of the main characters of ImA. She is probably Naoki's younger sister. She helped Washa after Naoki hurt him.

Personality
Jean is sassy and appears very confident, though it's possible that she is just faking it. She claims her difficult family situation is just "a way of living". She makes funny comments, but is not goofy like that all the time: she can also be a very good friend, as is seen when she helped Washa after Naoki had hurt him.

Relationships
Jean is Naoki's younger sister. He hates her and they have sibling rivalry and a difficult family situation. Jean is friends with Kitti, Washa, and later Chance. She skipped a grade when she was younger, which is when she came into Washa's class.

Washa and Jean are very close friends, although it bothers Washa that Jean's eyes are very similar to her brother Naoki's.