Hey there, You'll probably be thinking great another shitty Persona x My Hero Crossover. Won't even argue with you on that, it is my first story so there are bound to be bumps and cracks in this work.
Now! Getting to the Meat of the Topic.
Yes, this is a Persona Crossover but there are all other factors added to this besides MHA. Bullet point time!
Personas will still have abilities as they usually do, But this story is going with a more Shouenen Approach meaning Personas Are Stands! Yes, you will See Arsene Give a Villain a Seven Page Muda beatdown. Personas will basically act like sentient stands.
Characters from the Persona series specifically from Royal won't be mainstays, the only thing they'll get is a brief Cameo, not to be seen ever again. Example: Makoto is your Cute Senpai, but then she moves to a different city Etc. but don't worry she gets a proper sendoff. Only Important Characters from the series will stay, I.e Morgana, Igor, Etc.
This will not be following the Persona Story but elements will be in it. Various other Media elements will also be in it.
The story is broken up into different stories covering each Season of MHA. This will be a Prequel to Season one Anime.
The story will start getting darker, I.E rape and torture. This doesn't happen in this part.
Don't expect to see a vast array of Personas, granted I am a novice writer, and I can barely deal with the cast here. Six personas will be in this Story. obviously, 1 is Arsene and 3 more have already been planned. the other two haven't been planned yet.
That is everything I can think of. Oh! Obviously. Licenses and all that From Atlus, A Sega Compay, and Kohei Horikoshi was respected.