Yuiko Hawatari

Hawatari Yuiko (羽渡唯子 Hawatari Yuiko) is Ritsuka Aoyagi's classmate. At 5ft 5inch cm tall, Yuiko is much taller than Ritsuka and her other classmates and because of this and her mature, endowed figure, she is often mistaken for being older than she actually is. Despite her ditsy and bubbly exterior, she is sharp and goodhearted, though Ritsuka initially thought her annoying. Ritsuka also stated that he doesn't like people that are being used by others, which happens to Yuiko in the first episode.