|Hair Color||Light Brown|
|Relative(s)|| Mafuyu Shiina (little sister)|
|Position||Vice-President of Student Council|
|Light Novel Debut||Volume 1|
|Anime Debut||Episode 1|
Minatsu Shiina is one of the female protagonists in Seitokai no Ichizon. She is one of the Vice Presidents of the 32nd Student Council.
Minatsu is a bold character and Student Council Vice-president. A tomboy with impressive athletic skills, who is surprisingly also good in math, which Ken considers to be uncharacteristic of her. She's popular among girls and has a bit of a yuri taste. She's in the same class with Ken but she's an orthodox tsundere without any 'dere' (short for dere-dere (でれでれ?) to be found. She also has a little sister, Mafuyu Shiina. She's very protective of Mafuyu and despises anyone who tries to hurt her. She's into a lot of Shōnen manga as most of her suggestions tend to be based on typical Shōnen manga plots.
Like the season she represents, she's fired up and is always ready to take action, especially when it has something to do with anime or manga. She also have the ability to make someone feel a great deal of pain without actually injuring the person.
Minatsu grew up with her sister Mafuyu and her mother Kasumi. She had never met her father. One day, Kasumi decided to remarry to another man, which Minatsu strongly objected to, which created a rift between her and Kasumi though Kasumi broke up with the man soon afterwards.
Minatsu also caused Mafuyu's fear of men by telling her how scary and awful men truly are. She is also the person who sent Mafuyu to an all girls middle school.
During her first year in Heikiyou, she was nominated and became the treasurer of the 31st Student Council. In the summer, she met Ken while in the middle of going home who at that time was at a lost of what to do. There she gave him advice which helped Ken work even harder than before.
The following year, she remained in the Student Council as one of the Vice-Presidents and was in Class 2B with Ken. Minatsu was unwilling to meet her mother's boyfriend saying it had nothing to do with them, creating a rift between Minatsu and her mother, but their mother always took care of them no matter how tired she was. Thus, she decided it was best to see their mother happy by allowing the marriage with the promise to let both her and Mafuyu finish their current highschool year before transferring away. In the anime and novel, her feelings for Ken grow so much that she is aware that she´s in love with Ken. She is seen kissing him in volume 8 of the light novel and episode 4 of the second season of the anime.
- Minatsu （深夏）literally means deep summer.
- According to the Seitokai no Zukan,
- Her birthday is on 6th September.
- her blood type is O.
- she likes to eat meat especially yakiniku.
- she eats anything!