Depending on how the human skills function we could implement something like Force from WA
WA2 and 3 replaced MP with Force entirely but in WA1 and the remake everyone has MP for normal skills, but Force was something that started at 0% and could charge to 100% as various actions were performed, and Force Points could be spent on special character specific skills, for example, Rudy can spend 25% Force to activate Lock On which gives his next attack 100% accuracy
Not that I say we copy that exactly but it's an idea. Maybe mix that with PQ's leader skill
Call it like
Tension or some shit so certain characters can charge up Tension stacks to use specials that use Persona skills to benefit a normal human attack like that? i dont know