Hell was suffering. Ironic, I know, but it was facing a great struggle where a human was needed. A pure one, not like the sinners they already have. So naturally, it was a struggle as most of humanity already struggled to reach that kind of pureness.

Your father was a paranormal investigator, studying any kind of hellish being he could. Naturally you picked it up with some interest.

Stolas, the Goetia Prince, was responsible for finding the human needed. His search led him to you.