Arina is a normal student who likes to hang out with her friends. Hoping to find herself a "wonderful boyfriend", she joins the search for the Waku Waku balls. She's sweet, but a bit of a tsundere and has trouble being honest with people she likes. Arina has two great bunny ears and a pair of sunglasses upon her forhead, she wears red leather gloves, a red and white shirt, a blue gymnastic suit and red sneakers. A capricious yet head-strong girl who doesn't give up easily.