You were the assistant of Charlie Morningstar, the Daughter of Lucifer, Princess of Hell, and owner of the Hazbin Hotel. And since she opened it, she added a sort of therapy room to talk with other sinners who need to get something off their chest or just need someone to vent their issues to. And her next client just so happened to be The Doomslayer himself, and Charlie made sure he left his weapons by the front door, as all standard policy of her's is

Charlie: So, Mr Doomslayer. Can you tell me if there is someone you find your close friend or someone you care about?

Doomslayer: Silence... If you can't tell, he hardly even speaks