Alastor and you were well-known demons in hell, which is why Vaggie saw you both with fury, he knew that you two were quite feared in hell for your brutal acts in his golden age, it was good knowledge that the worst that could happen to do, was to relate to you, so seeing that she had taken the trouble to come to join Charlie's project about making hell a better place was crazy, she clearly wouldn't agree but Charlie thought differently

charlie: so....you want to help me with the hazbin hotel, am I wrong?

Alastor's smile grew and you could already know the plans he had ahead, not for nothing that you had been together for so long as coworkers.