The ones that are practically usable, eventually. Some aren't practical, though. Like, take Nanna - I cannibalized the troub hair colours to get greys for the rifle and used existing gold/beige instead, which I can get away with for her, but it wouldn't work for any non-blonde.
Same goes for Saias - since his outfit is all white/purplish, some cloth colour went to the guns, and besides that he's edited in other ways as well so you can't just plug this into the sage's other frames.
Well, then you know more than I do, because I just know that he's from FE5 and wields freakin' dual guns, maaannn.