@EVA_01: Added Great Will to the Headache section due to its rather vague nature in Megami Tensei and the mentioned version of Hitoshura was added to the ban list. Check under Hitoshura for the latter as I've also previously banned the full-demon version of the character due to him being megaversal.
@tiraomoz: 70+? Cool. There are thousands upon thousands of named demons / entities in The Amala Multi-verse, the weakest of them being able to create their own dimension. There's your answer. Oh, and that's 1000s per universe, so the sum is actually way more, seeing that The Amala Multiverse is made of up billions and billions if not infinite universes.
@Dream: Yep, this is right. But just to clarify, TDE Demi-Fiend is one and the same with Full-Demon DF, since he asks Lucifer to turn him into a Full-Demon at the end of that route, making him much powerful, powerful enough to kill a being more powerful than YHVH.
So it goes:
TDE Demi-Feind: Megaversal.
Reason: More Powerful Than Kagutsuchi and Lucifer.
Full-demon Demi-Fiend: Nigh-Omnipotent.
Reason: Deemed powerful enough by Lucifer to kill a being more powerful than YHVH, who is Nigh-Omnipotent himself.