Yeah FF6 has Relm, whose ability "sketch" lets her copy enemies' attacks by drawing them with a brush. It's fairly similar to blue mage in its original form, but I highly doubt they'd make a second, highly similar limited. So I suspect it's a lot like blue mage in its style except it's a real job.

Previously Yoshi P's shirt clues have not been particularly complicated so I think this solution makes the most sense so far.