She is a student at Setouchi Keijo Training School, the ninth ranked examinee, and a member of the Elite Class.She is also nicknamed as the Winged Rabbit (羽兎, Hane Usagi).
Upon graduating from Seoutchi, Usagi officially becomes a B-Rank Keijo player, affiliated with the Kansai's Nara Branch. Sometime later, she is able to advance to the A-Rank.
