I'm not sure where her neck is, admittedly, but otherwise this is a wonderfully drawn picture and adorbs to boot :3
I've always liked the White Mage robes a lot more than Black Mage fare. Gardevoir are definitely better suited to the latter based on their movesets, but the original game doesn't have a heavy focus on healing techniques the way most RPGs do, and they /do/ have the most standard one (Heal Pulse), so who knows - put magic into the equation and the class might work out.