Appears in episode 2.

The girls' ninja teacher of Hiritsu Hebi Joshi Gakuen during Senran Kagura Burst. She was formerly called Rin, a student of Hanzou Academy until she faked her own death. Her goal when young was to become a "super ninja."

It was hinted that though she is with Hiritsu Hebi Joshi Gakuen, she still maintains a certain respect for her teacher Kiriya.

(Source: Wikipedia)