Haven't summoned him, so I can't give a proof, but logically all units that are summonable can have IV.
As for the other part of the question: I hope, but I doubt it. The difference between Kaze and all the others is the fact, that they are TT rewards, whereas Kaze was a special Golden week quest reward. We haven't been given any clues so far, whether TT heroes could ever reappear (with the obvious exception of Masked Marth).
- Log in to post comments

Fate Grand Order
Dragonball Legends
IV Calc
Heroes