Mizuki Usami has neck length brown hair and often wears a bunny hairpin on the left side of her hair. She has brown eyes.
She usually wears her standard school uniform.
She is the only serious member of the art club. She tries her best to help her fellow art club members with their work.
While being serious, she has also shown that she can easily be aggressive when other people tease or irritate her. In the President's case, she will use her baseball bat to hit him when he takes pictures of her and accidentally drops her painting on the spilled paint. Other than that, she will get embarrassed when other people tease her about Subaru Uchimaki and her.
She is also a kind and helpful person as shown when she is willing to help a mother to find her lost daughter. In school, Usami is also often trusted by teachers and offered to join the student council when she was first year.
She has a crush on fellow art club member Subaru Uchimaki. Even though they often argue with each other, Usami still cares deeply about him. When Uchimaki feels what he has done is too mean, he may draw and give her a picture of her. Likewise, Usami attempts to help Uchimaki, for example she bought and gave him a magazine to mark down various hairstyles when he was having trouble thinking of ideas for his "bride's" hair.
She's a new girl that is now in the same class as her crush (Subaru Uchimaki ). At first she thought that she wouldn't be able to get along with her but after seeing her help that boy with his balloon she changed her mind, but she still isn't sure.
- Mizuki's zodiac sign is Aquarius.
- Her father was never mentioned in the manga.