کوتوکو یواناگا

Kotoko is the current girlfriend of Kuro Sakuragawa. She is known as the "Goddess of Wisdom."

As a Goddess of Wisdom, she also has only one eye and one leg, with her right eye and left leg being prosthetics. Her glass eye looks identical to her functioning eye, and her prosthetic leg attaches around mid-thigh height.

She has a very outgoing personality and always makes an effort to find the root of any problem, especially when she has the help of youkai. She is oblivious to danger and she tends to be very clingy when it comes to Kuro. Kotoko is a self-centered, unrepentant prankster, who enjoys poking fun at others' expense, and is also a bit of a pervert. She is also shown to have a rather childish demeanor whenever she feels she is not given enough attention or the proper treatment, which is aimed especially at Kuro, to whom she can be very pushy.