Yeah. I started it, but never played through it.
They summon their Personas by pointing an Evoker at their head and pulling the trigger. I like it, but it is definitely something that is a little too questionable.
So it appears Valve has REJECTED the offer to get Skullgirls hats added. Interestingly, over a thousand people backed out of their $30 pledge of support after finding this out. One thing is certain: The TF2 community knows their priorities.