father, who calls her Hii, works at a scientific lab. She wears random costumes in certain episodes, and when someone compliments them, she acts out the costume she is wearing. Her mouth isn't shown, even when she talks. Her dream in the future is to become an astronaut despite having to potentially study abroad and away from her friends, though she assures Anzu and Koume that she will always come back to them and they will remain friends. She has a crush on Kenji. Voiced by: Hiromi Igarashi Yū is a boy who once helped Koume when she fell down and as a result Koume starts to like him. He's in the second-year Sunflower Class. In the anime, when the children return from summer break, he gives her a stuffed koala doll. Voiced by: Manami Numakura Kenji is a boy from second-year Sunflower Class who challenged Hiiragi to see who was smarter and lost, prompting him to start calling her "master" and decide to be her student. He develops a crush on her. Voiced by: Mariya Ise Hinagiku is a girl whom Tsuchida helped. She falls in love with him and enrolls in Hanamaru Kindergarten to be close to him. She is placed in the second-year Sunflower Class. Hinagiku is surprisingly very mature considering her age, and is the daughter of the head of a yakuza clan (whose members highly respect her). Anzu considers her to be a rival, but she treats her kindly. Voiced by: Hiromi Igarashi Aoi is a girl in Tsuchida's class. Her parents are fishmongers, and she is proud of them, and likes to help them with the business. She appears both in the anime and manga. Others Voiced by: Yōko Honna Sakura is Anzu's mother and Tsuchida's childhood friend who is a year or so older than him. She encourages Anzu in her desire to marry Tsuchida (a reflection of her own marriage to her Art teacher). She got married and pregnant while in high school and did not graduate (despite having only one term to finish) because she dropped out to be with her husband-() when he got a job teaching at an American university. She has a wild strand of blond hair that sticks up, which Anzu seems to have inherited. Despite no longer being students, Tsuchida still calls her Senpai. Voiced by: Shion Hirota Satsuki is Naozumi's younger sister. She visits the