Well It sounds like this is a bit more involved than I thought.

Still, being able to customize your own chat box would be another layer of investment players could achieve. Could you imagine if everything you typed to your party outside of dungeons had both your portrait and a custom speech bubble effect?? Like I want a dragoon to be able to use that chat box that Dragons use when they're speaking. I'd pay money for high end stuff like that, and it makes portraits have another appearance besides the brief flash right before you do a dungeon.