Fic writers often depict Braska as a white mage, perhaps because Yuna is as well and perhaps also because summoning seems to be the preserve of white mages in FF9. In the mobile games where Braska is playable, though, he’s more of a black mage: in FFRK, iirc, he was a black mage with fire affinities, and the same is (was? ☹️) true in DFFOO, where he has a couple of white spells (Curaga for one) but these are outnumbered by black ones. In FFBE, he appears to be some kind of support unit? It looks like most of his abilities just apply buffs, but I also never play this game and don’t really know what’s going on.