Jaina is a second year student at Kijiyama South High School and plays as a sweeper. Off the field, Jaina is quite passive, but also tends to look down on others. Although she would never admit it, she likes to spend time around her friends. She can be obsessive when it comes to cleaning, as is shown when she organises garbage in convenience store bins to look neater. While playing, she is also obsessed with “cleaning,” which is how she describes her defensive style. Akane and Aoi describe her as a charismatic defender. Her aggressive tackling and commanding aura, known as “Jaina's World” is greatly feared by opposition players. She certainly has the air of a captain and her teammates follow her every order to the letter, completely putting their faith in their leader. She commands and moves her fellow defenders around the field like chess pieces to block their opponents. (Source: Mai Ball Wikia)