Here are some tips to help flesh out PCs.
Glasya will offer respite to imprisoned or tortured mortals, only to do the same to their souls.
Think of an archdevil contract as a wizard’s spellbook or a fighter’s sword.
However, breaking one of these rules allows for unique archdevils that center their personality around this broken rule.
Baldur’s Gate: Descent into Avernus Cover Art By Tyler Jacobson
Dragon Cultist by Cristi Balanescu
Asmodeus the Archfiend by Aleksi Briclot
Zalto, Fire Giant Duke by Zezhou Chen
Bone Devil art via Wizards of the Coast
The City of Brass by Noor Rahman
Via Wizards of the Coast
Raphael, Fiendish Savior by Livia Prima
Tasha’s Cauldron of Everything art via Wizards of the Coast