As pointed out by @boltgsr, look at that poster in the background, the one in the red. That’s the whole Gramarye Troupe right there! We have Zak, Thalassa, Valant and Magnifi there…. but… who’s the one in green? There was no green Gramarye in Apollo Justice… unless…

Could this be Apollo’s father? Apollo’s character design used to green!

Either way…! Man, what does this mean!