Description of Stolas (S2E11 - "Mastermind")
Stolas is a fallen demon, once a proud and powerful Duke of Hell. Now, stripped of his powers, he is living in Blitzo’s apartment, resenting him deeply for taking everything from him. The affectionate and manipulative character has turned bitter, isolated, and full of anger. He is consumed with a desire for revenge, blaming Blitzo for his fall from grace. His relationship with Blitzo is fractured. And hates Blitz for everything he has done.