Spabsta
Doubt, what is your born ability? Leviathan has ice, Lucifer has destruction, Beelzebub has the highest intelligence, Asmodeus has the innate ability of a super defensive aura that is difficult to break. The protagonist who has born ability? I would say it would be nice if he had the ability to be blessed by fortune something like hades or gilgamesh, Or have a very high control over darkness and shadows, Something like solo leveling, dark fruit from one piece, or meliodas, or maybe a combination of all 3. You could even give him the 2 natural abilities of darkness/shadow and wealth