Off-Topic:
Someone want more about Nint COnference about SMT:V and the featuring the Old Dante from DMC series┬┐?
On-Topic:
So, even early Game on All the games, every character can harm demons, can ahrm: Physical, Matter, Soul, Mind, Elements, Concept, Information, Data, Logic, Law, Non-Corporeal/intangibles/Abstracts, etc, no?
And, what happens about "Levels" of the Demons? i remember something about no one can hadle/controll demons above yours because they will free and killing you (outside game mechanics) and they are some special cases like The Hero on SMT with Pascal/Cerberus....this count like "if you want to control the demons (with any ability or who know), if you are not at his level or higher, the demon will be free and will kill you right?
Also, as i said here (if i remmeber), fissions, change skills, etc, is a real thing, inside and outside the game's history and mechanics.