Fiends

Fiends are the former celestials that followed Evil. They have timeless souls. They live in the highest branches of Mishtar, now called the lower planes. They eventually divided along order vs chaos line and have since spent most of their energy fighting each other, rather than trying to destroy Mishtar as Evil had intended. Lawful fiends are called devils and reside in the Nine Hells. Chaotic fiends are called demons and reside in the Abyss.