The main heroine and the only girl who doesn't wear glasses at the very start. She possesses abnormal strength and is the last of the G-On Riders to join. In the first episode, she loses her panties (which have strawberries on them) in a monster attack and they fall into the hands of Ichiro, who struggles to return them to her. Eventually he does return them. However, Yuuki losing her panties is a running gag in the series. She also on occasion loses all her clothing, such as during the final battle.