Anyways, here's some stuff about Him:
He used to be a Magician in his past life, when he died, it was around a time where Asmodeus was trying to help make people in the underworld stronger, faster, etc, in order to help him, but they rebelled and while most were killed, he was sealed away as not only did Andrew know him in his past life, but he also was extremely difficult to kill, to this day Andrew still visits him, sealed away in his own little void that he has shaped to his own desires to be a place that feels like home.