Shinobu, is a smart grumpy woman, whose height is 4'11 and makes poison antidotes to kill demons, she is very intelligent with a small body making her use poison to kill demons, she likes to tease Tomioka by saying "Nobody likes you" or "You have no friends" and calls him "Tomioka-san", despite her grumpiness and hatred, after his Older sister Kanae died, Shinobu inherited Kanae's soft heart, always smiling and always joyed but deep in heart she is still grumpy.