[quote=@Zeroth]
[@Lmpkio]In the Hero Academia series, usually people who have "form" Quirks that turn their bodies into something else are generally always in that form, with only a few exceptions that do a full transformation. But for those that do transform, that's usually their one specific power--to transform into X. Terror Wing has the ability to camouflage himself and split plasma as well as the natural abilities his form gives him. If he's stuck in the form, and there are some more detailed explanations for the other powers, it could all be bundled into one package. But if his power is to transform into the beast-form, then having those other powers is much harder to justify. I think, given how powerful he's intended to be, he could also do with a few more limits. 

Another way you might be able to "add" powers to him, though, would be through the experimentation that was done on him. Maybe his parents added cybernetic enhancements of some sort to him, or something along those lines? 
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Now to be fair, I have virtually no knowledge when it comes to Hero Academica, so thanks for letting me know on that. If you want Radon to just be in his beast form, I can totally live with that no problem. The serums and all that stuff that would be injected into his body will also have the pigment transformation and the ability to breathe plasma.

Now power-wise... I could think of a few additional things, but cybernetics will probably not be the way to go. I mean maybe down the line when say his arm or his wings get ripped off (I should add the weakness being his wings btw), he could get picked up by some organization and make him have said cybernetics, but that'll be down the line. For now, I'll think of a few more abilities for him to use, so stay tuned.