Tamayo's Cat

Tamayo's cat is a cat that takes the blood Tanjiro collects from the higher level demons he has killed and sends it to Tamayo for her to research on in an attempt to cure Nezuko.

Appearance
She is a calico cat with large yellow eyes and a small box strapped to her back meant for transporting a vial of demon blood. She also wears a red collar with a paper attached with an eye and other symbols drawn on in red ink, this is a part of Yushiro's Blood Demon Art.

Abilities and Powers
Yushiro's Blood Demon Art: Using Yushiro's Blindfold Technique, she is able to turn invisible with one meow and reveal herself with a second meow.