User blog comment:SpookyBoogie27/Light Novel Spoilers/@comment-6253635-20130205080647/@comment-33447191-20130205082409

Yasaka is the leader of the Youkai in Kyoto. She's not a Queen piece, however her daughter, Kunou is a possible candidate to be one of Issei's local wives (part of his harem) as she later appears in one of the short stories.