Subaru Hasegawa (長谷川 昴 Hasegawa Subaru?)
- Voiced by: Yūki Kaji
The main protagonist and a high school student who is tasked by his aunt to coach an all female sixth grade school basketball team. Currently, his school's basketball club had its activities suspended after its team captain got himself involved in a scandal. He reluctantly accepts Mihoshi's offer for him to train the girls for only three days initially, until he learns that the club is at the brink of being disbanded without his help, and he realizes how important it is to Tomoka and her friends.
Tomoka Minato (湊 智花 Minato Tomoka?)
- Voiced by: Kana Hanazawa
The heroine of the series, the best player of the team and the only one who had played basketball before. It does not take long for Subaru to find great potential in her, and thanks to her talent and dedication he decides to keep coaching them. She has not been in Keishin Academy for long, in her previous school she became so obsessed with winning that it caused her to become isolated and was forced to transfer. In Keishin Academy, she found new friends and realized that winning is not everything. Despite the fact that she still loves basketball, Tomoka is not willing to play without having her friends with her. Of all the girls, Tomoka is the one who gets closest to Subaru and seems to be the one who likes him the most.
Maho Misawa (三沢 真帆 Misawa Maho?)
- Voiced by: Yuka Iguchi
Coming from an extremely wealthy family, Maho is the most energetic and athletic member of the team, who is always coming up with ideas that always seem to cause embarrassment for the other girls. She was the first of the girls to befriend Tomoka, as well as the reason Tomoka decided to form the girl's basketball club.She is the youngest of the girls. She is afraid of the dark. She is also described as Takenaka to be a genius, quickly adapting to any sport she gains interest in. Unfortunately she also loses interest just as fast, which is the source of her split with him due to his seriousness of basketball and her developing interest.
Airi Kashii (香椎 愛莉 Kashii Airi?)
- Voiced by: Rina Hidaka
The most quiet and shy girl of the five. Due to being too tall and well endowed for her age, she has an extreme complex about her h eight, which causes her to burst into tears whenever any mention of it is being made. She happens to be the oldest girl in the group as well, being born in April. When younger, she fell from a boat into a lake and since then developed a mild case of aquaphobia that prevents her from swimming.
Hinata Hakamada (袴田 ひなた Hakamada Hinata?)
- Voiced by: Yui Ogura
The smallest of the girls who often speaks in a polite manner and has a huge collection of plush toys. Despite looking like she is the most innocent and naive of the team, sometimes her behavior suggests otherwise. She looks like the youngest. Hinata has an overprotective, younger sister named Kagetsu who is a lot larger than she is.
Saki Nagatsuka (永塚 紗季 Nagatsuka Saki?)
- Voiced by: Yōko Hikasa
The bespectacled and level-headed member of the team, who keeps Maho in check whenever the latter goes overboard with her enthusiasm. She also stops Maho and Takenaka from fighting as well. She works with her father in an okonomiyaki shop.
Mihoshi Takamura (篁 美星 Takamura Mihoshi?)
- Voiced by: Shizuka Itō
Subaru's aunt who was chosen as the advisor of the basketball team and having no knowledge of the sport at all, she blackmailed him by threatening to expose embarrassing moments of his childhood if he would not help her with the club.
Nayu Hasegawa (長谷川 七夕 Hasegawa Nayu?)
- Voiced by: Mamiko Noto
Subaru's mother and Mihoshi's elder sister who was worried about her son after he was forced to stop playing basketball at school, and got herself relieved knowing that his enthusiasm was renewed after he became the girls' coach.
Kaoru Minato (湊 花織 Minato Kaoru?)
- Voiced by: Yumi Uchiyama
Tomoka's mother. She is a Traditional Dance teacher. She have young appearance, like she is Tomoka older sister. She's rooting about Tomoka playing basketball and hoping Tomoka doing the best things.
Natsuhi Takenaka (竹中 夏陽 Takenaka Natsuhi?)
- Voiced by: Minako Kotobuki
He is the captain of the boy's basketball team. He is convinced that the girls' basketball club does not deserve to exist as, to him, its members are only playing around instead of truly competing. He harbors a crush on Hinata, a fact known by all his classmates. He is also childhood friends with both Maho and Saki, and fell out with Maho over basketball, although they eventually make up.
Aoi Ogiyama (荻山 葵 Ogiyama Aoi?)
- Voiced by: Kanae Itō
Subaru's childhood friend and also a former member of his school's basketball club, who displays feelings for him despite refusing to admit. She is always prone to help Subaru when he is in trouble or depressed, but for some reason he avoids telling her he is coaching a team of elementary schoolgirls, until she follows him and finds it by herself. She also has romantic feelings for Subaru being that she often blushes when something is said regarding the two of them being together.
Kagetsu Hakamada (袴田 かげつ Hakamada Kagetsu?)
- Voiced by: Asami Seto
Hinata's younger, but taller, sister. Because of an incident three years ago that caused her older sister's collapse, Kagetsu became very overprotective, causing her to act irrationally such as making the school nurse take her to the beach so she could convince Hinata to go home and disapproving of Hinata playing basketball. But after her sister proves that she can handle herself, Kagetsu relaxes and the two have a much happier relationship.