Minotaur serves in the Demon King's army within the Demon Castle. He resembles a classic minotaur, standing 6'5" tall with black eyes. He has one missing horn and wears a yellow bead necklace. Bandages cover his left arm, while his right arm remains covered in fur. He typically appears shirtless, wearing only pants.

Compared to other castle inhabitants, Minotaur possesses notable common sense, though he loses composure when encountering cute things. He maintains a close friendship with Quilladillo and relaxes through their regular casual conversations. Despite the risks posed by Princess Syalis's activities, he values these interactions too much to stop spending time with Quilladillo.

Minotaur frequently becomes involved in the princess's schemes. Once, when she shrank herself, she used him and Quilladillo as a ladder to climb. While Quilladillo held onto the miniature princess, Minotaur and other demons showed unexpected fondness for her smaller form, finding the experience uniquely pleasant due to her reduced threat level. His reactions to her requests can involve shock, such as when she ambiguously asked demons to "touch" her to address acupuncture needs, causing confusion among the group.

His real name is "Prime." He prefers soy milk over cow's milk, enjoys salmon sushi, and reads fighting manga. Additional traits include incoherent sleep-talking due to snoring and a dislike of horror movies, which frighten him.