Douman Ashiya

Douman Ashiya is a first year student of the Yamato Academy, even if she consider herself an S rank, she's just a skilled little girl wearing a fox mask and a school swimsuit who tries to steal Ryuubi Gentoku's magatama by infiltrating alone at night at ryokan where the Kanto students are resting. The attack fails, but she still manages to defeat and steal Shikou Soujin's magatama before fleeing.