The Student Council Accountant (treasurer). She is also a ninja. Yuka appears to be carefree most of the time. However, she is very cunning, mostly encouraging activities of the Maken-ki that involve some kind of other work that needs to be done. The most obvious of these actions is the "match" between Venus and Maken-ki, where the players use broomsticks and soap while playing in the pool. She is close friends with Furan and likes to tease her. Yuka is also the younger sister of Takeru's homeroom teacher Tomiko Amado. (Source: Wikipedia)
President of Student Council
An older male teacher at Futatsubashi Elementary School. The only one of the four main teachers seen in the series with children, specifically a daughter, Oyajima has an easygoing outlook on life and teaching and frequently dispenses advice and words of wisdom to his younger, more easily excitable work colleagues. Rarely flustered, he is the senior of Sae Shirai and has a visible soft spot for her, often offering insight to H�in concerning their mutual colleague's behavior, background, and mindset in his usual, laidback style without coming off as defensive or biased. His good working relationship with Shirai also allows him to present her with alternative points of view or make thought-provoking observational comments in a gentle, nonconfrontational manner without either one of them getting worked up in the process.
She is a university student who lives in the same building as Shinkur�. She can be described as a very flirtatious person and her advances are noticeably more aggressive with Shinkur�. She says she is very knowledgeable in the ways of love but doesn't include her own experiences as she has a hard time keeping a boyfriend. She has grown fond of Murasaki and teaches her all kinds of perverted terms, much to Shinkur�'s objections. Tamaki is an instructor at a karate dojo, and is very formidable at fighting, with notable feats such as stopping a punch with just two fingers and standing on par with Yūno at full strength. In the anime, she is just a normal university student looking for love and also possess fighting skills.