Takagi Kime

Takagi Kime appeared in the very first episodes as a friendly woman, but everyone later figured out she was a part of Daakuseiken, a servant of Yamawaki Naomichi, while he was an evil person. She then swinged her katana into his chest, killing him instantly, but it later appeared that Yamawaki actually survived, healed by The Keiseiken Master, after he sent her soul back to the Darkworld.

Here whereabouts and whether she has taken the form of a human, are currently unknown.