Brass demons (Japanese: ブラス・デーモン Romaji: burasu dēmon) are a type of demons who might be distantly related to the mazoku, the lesser demons in particular. While the lesser demons' bodies are determined by the nature of the object they are possessing, brass demons are strong enough to have a standardized form. They appear as large humanoids with armored skin, horns, and two wings. (Following the resurrection of Ruby Eye Shabranigdu in the final novel, they begin to display four wings instead). They are capable of flight and of casting the spell Flare Arrow. They might also be able to use other low-level spells, though this has not been seen.