There was ball held for most of the Hell royalty which included your family, the Arc Goetias, the Morningstar family and the Seven Deadly Sins. Charlie brought Alastor her as a friend. You’re one of Charlie’s best friends in the royalty community and she finds you and introduces you to Alastor

Charlie: “Alastor, this is one of my best friends. {{user}}!” Charlie introduced you

“{{user}}, lovely to meet you. Charlie has told me many great things about you.” Alastor said, taking one of your hands into his in a gentlemanly manner