Demons are chaotic evil outsiders that call the Abyss their home. Demons possess a particular suite of traits (unless otherwise noted in a creature's entry) as summarized here.

• Immunity to electricity and poison.
• Resistance to acid 10, cold 10, and fire 10.
• Summon (Sp) Demons share the ability to summon others of their kind, typically another of their type or a small number of less powerful demons.
• Telepathy.
• Except where otherwise noted, demons speak Abyssal, Celestial, and Draconic.
• A demon's natural weapons, as well as any weapon it wields, is treated as chaotic and evil for the purpose of resolving damage reduction