She is kind and caring, possessing a motherly personality. Tatsumiya wears a white furisode accented with grey markings and red trim, the end of the long sleeves has red decoration on the tips, and tied with a red obi. Her obijime is yellow and decorated with a white fish. Old was Tatsumiya's former fellow familiar. In the past, an altercation between her and Old ended with Old possessing noticeable scars that were made through the usage of the Sacred Sword. Old seeks revenge on her.