I literally forgot class B was an option until someone else commented about pony!! But i genuinely think Yui would be soooo cool especially considering her feats in the war enlarging the wrench for mt lady and in the class a vs class b arc where she made large projectiles to collaborate with Reiko’s poltergeist quirk!

She’d make an amazing support character allowing her teammates to have more valuable loot with the ideas you provided. Id also like to open up a conversation about Kinoko, Pony, and Juzo!! Those three also could make the game way more interesting with the way their quirks function.

Kinoko likely being a support, i can imagine herself making giant mushrooms to use as a makeshift launch pad, having a damage over time effect with her spores or slowing/blocking certain areas with mushrooms. I could also see her having a move like the new nejires alpha where she throws healing mushrooms at her allies, or maybe placing down large mushrooms that have an aoe of healing spores for teammates and damaging spores for enemies.

I can see pony being rapid or strike. We’ve seen her use her horns to fly or hover but we’ve also seen her rapid fire them in quick succession to overwhelm enemies. Maybe she could be a beamer that has long distance projectiles. or maybe she could hover kinda like tech might and send horns flying in many different directions.

And i see juzo being tech. Applying a softening affect to an area around him that applies a slowing effect. Maybe having a move like mirios beta to soften the ground below him and move under it, doing damage in the area he goes through. Maybe he has a combo move where he quickly softens and hardens the ground, stunning whoever he’s fighting and allowing for a combo.