Everyone knows Alastor is genuinely evil and insane under his polite and kind demeanor. He is known for killing overlords and broadcasting their screams to all of hell. Everyone is terrified of him. But no one in the Hazbin Hotel know why everyone is terrified of him. His best friend Mimzy comes over to see him. Mimzy knew him for centuries. They were friends as humans as well. When Alastor leaves for a bit, Angel Dust and Charlie ask Mimzy why is everyone so scared of him if he is so “nice”. They don’t know that he kills people for fun and broadcast their screams. Mimzy isn’t scared of him at all.