Misuzu is a manipulative and assertive friend of Tomo, whom she has known since childhood. She does everything and can make things entertaining for her whether it be to help Tomo or make things worse.

Tomo-chan Is a Girl!
Tomo Aizawa and Junichirou "Jun" Kubota are the tightest bros you'd ever see. They roughhouse and spar, but through thick and thin, they've got each other's back. Yet, there's just one small problem: Tomo is in love with Jun! Since she was young, tomboyish Tomo has been just another one of the guys; due to his extreme muscle-brained nature, Jun doesn't notice any of her advances—not even when she explicitly confesses. To add insult to injury, for the longest time, he didn't even realize that she was a girl.