Upper Rank 4. A woman who plays the biwa to expand the Infinity Castle or summon people (demons and Demon Slayers alike) into it.

Upper Rank 3. Has tattoos on his face. He was demoted from Upper 2 to 3 after losing a Blood Battle to Doma. Male. He finds weaklings boring and enjoys encountering the strong. He attacks women but refuses to eat them.

Upper Rank 2. Sly and runs a cult called the Eternal Paradise Faith. He attacks by creating frost with his fans, which are made of a metal-like material. He only eats women. He rose from Upper 6 to 2 after a Blood Battle with Akaza.

Has six eyes. He hates Yoriichi and desires to surpass him. Upper Rank 1. Uses Moon Breathing. He seems to enjoy playing Omok? Male.

The first demon. He was once utterly defeated by Yoriichi and is extremely terrified of him. His goal is to find the Blue Spider Lily. He can change his appearance into a child, a woman, or even change his clothes. Male.