User blog comment:B214/Question and Answers 6/@comment-185.112.105.215-20180223114136/@comment-26926813-20180223123819

1. Power of Hole is from Abaddon clan. Belial has Demonic power called "Worthless". And their could inheriet both power. Sirzechs inherit both Bael PoD and Gremory talented in magic.

2. Well it was rather problematic but we have no information about that facts

3. Original Haracles never mentions in LN. He could be in Isolation field since he one of the strongest Greek gods after his Godification.