Kokon

The mysterious foxdemon girl who appears one day at Rens school. She says she knows him although Ren cant recall ever meeting her. She claims that Ren had saved her life and now she wants to return the favor by staying by his side as much as possible. She shows up at Rens school when she is told to stay hidden but is always popping up wherever he goes. Kokon left her group of fox yokai when she was chosen to become Miko the God of the Mountain so technically she is bit a yokai anymore. As Kitsuneko states.