Also on purely thematic grounds, Hallar the Firefletcher might fit, since they're gender-nonconforming, RG, and have a sort of inverse version of Chandra's passive ability when using kickers. Of course, then you'd need to find some kicker spells to include and it might skew the deck into a different sort. However I don't get the impression Hallar's mechanic is all that good, as opposed to just conceptually interesting...