[Oh, god. Oh, Prompto, honey. Max is just gonna pull Prompto into a hug, if he allows it, wrapping his arms around him and rubbing his back.]

Prompto, Prompto, breathe. You're okay. [Not "it's okay", because hoo boy it is not] Genetics...genetics isn't even a thing, bud, you're not anything other than who you are. You haven't done anything wrong. Luna'd tell you the same thing.

[This is small potatoes. This isn't addressing the whole question of magic Clone Wars happening over there - and Max winces inwardly at the comparison. How belittling. But, you know what, he can't do anything about magic clone guy. Just Prompto.]