Upper Rank 1. Uses Moon Breathing and has six eyes. The strongest Upper Rank after Upper Rank 0. He treats Guest, who is Upper Rank 0, with great respect.

Upper Rank 2 — Doma. Ice Blood Demon Art. He always wears a smiling expression, but he lacks empathy and has a cruel personality. He uses fans to create ice for his attacks.

Upper Rank 3 — Akaza. Destructive Death · Martial Arts Combat. A demon who fights primarily with hand-to-hand combat. He loves fighting strong swordsmen and possesses exceptional battle skills. He is loyal to Guest.

Biwa Woman Nakime (Upper Rank 4). A female demon who plays the biwa to manipulate the structure and space of the Infinity Castle. She is loyal to Muzan, cold, and a woman of few words.