Umi Mamizuka

Umi Mamizuka (狸塚 うみ, Mamizuka Umi), née Momoga, is the P.E. teacher at Morinomiya Academy's high school, the wife of Mamizuka Kousuke and the mother of the twins Takuma Mamizuka and Kazuma Mamizuka.

Appearance
Umi has thick curly blonde hair with side bangs and she is known for her iconic "eye smile".

At the school, she is normally seen wearing a tracksuit, while at home she wears more casual clothing.

Personality
Like Takuma, Umi has a bright and bubbly personality. Ever since she was a young child, Umi has rarely been seen without a cheerful smile on her face. She has a generally more relaxed and calm approach to parenting, especially when compared to her husband, Kousuke. She is a very maternal and comforting presence to her son, Kazuma, who cries easily.

Umi cares a lot for her family, letting her eager sons run their first errands by themselves (with Kousuke following them to keep them safe). She trusts her husband greatly, especially when he felt guilty for having to kiss other women as an actor.

History
Umi is married to Mamizuka Kousuke, a famous and well-recognized actor. She has two identical twins named Takuma and Kazuma. Takuma inherited his mother's carefree and bubbly attitude, while Kazuma has his father's fearful and worrisome attitude.

Mamizuka Kousuke
Even though Kousuke is plagued with self-doubt, Umi believes in him. Umi is prone to making jokes that Kousuke finds hurtful, but she absolutely loves and trusts her husband regardless of what he does during his acting roles. Considering how much she loves watching him perform, this is very fortunate for them both. Whenever their sons aren't being as affectionate to Kousuke as they could be, Umi is happy to lead by example in order to encourage them.

Though one can't tell just by looking at her smiling face, Umi gets jealous when other girls get too close to her famous husband outside of a film shooting. When the female students mobbed Kousuke at school, Umi sent them running by warning that not returning to class at once would result in the chairwoman making them repeat a year. While she does trust him not to be unfaithful, Umi can't help but "joke" that she would kill Kosuke if he kissed other women outside of work.

Mamizuka Takuma & Kazuma
With one son who's willful and another who's reluctant, Umi has her hands full as a mother. Her preferred method of parenting usually revolves around encouragement and compromise. Knowing that Kazuma is easily frightened, Umi will usually try to assure him that he was capable of anything, often to no avail. She won't often force him to do anything that truly upsets him. Takuma on the other hand is prone to acting before thinking, so Umi has to keep an eye on him in order to stop him from doing things he shouldn't. She often coaxes him into doing what she needs him to do by appealing to his desire to be dependable. Overall, Umi sees fit to take any opportunity to allow her sons to become more independent and responsible.

Umi can be authoritative when she needs to be, and does not let misbehavior go unpunished. When Takuma and Kazuma were fighting over who got to wear a particular shirt, Umi stepped in and forbade either twin from wearing it. She's also sly at times, once showing the twins how upsetting it was for them to rampantly kiss non-family members by telling them she would be glad to kiss Ryuu.

Trivia

 * She shares the same voice actress with her son, Takuma.