Kaisei Ebisugawa

Ebisugawa Kaisei is the daughter of Ebisugawa Souun. She was Yasaburou's fiancé until Shimogamo Souichirou's death. She never let Yasaburou see her in her human or tanuki form. She hates Benten for her involvement in Souichirou's death and is jealous of her relationship with Yasaburou.

The reason why she never showed herself to Yasaburou is because he is unable to keep his illusions around her.

At the end of the 2nd series, Yasaburou accepts Kaisei as his fiancé despite his inability to retain his human form around her.