Demonettes are the result of union between a succubus and a human male. Their individual appearances vary, but their vestigial horns and small leathery bat-like wings denote their demonic heritage. Most favour their demonic mother and revel in chaotic evil. A minority (20%) harbour less demoniacal inclinations. Nevertheless, they may never be lawful or good.

Demonettes are invulnerable to normal melee and missile weapons. Only iron and magic weapons can harm them. Demonettes have a natural base armour class of 5. Wearing mundane armours cannot improve this. Magical armours or other protections add only their bonus, unless the armour is superior to AC 5, in which case the full benefit is accrued. In addition, demonettes may have a bonus for high dexterity, as do humans.

In melee, demonettes may wield any sort of weapon regardless of any class restrictions (see spell casting abilities below).

Treasure: Demonettes normally care little for coins. They love gems, jewellery and magical items however. If found in their lair, a demonette will have a cache that contains 1d4 random scrolls (50%), 2d4 random potions (40%), 1d8×10 gems (90%), 5d6 jewellery (80%) and 1d6 other random magical items (excluding potions and scrolls, 70%).