User blog comment:ChishioKunrin/BBTAG Beta Screenshots/@comment-25936766-20180513193957/@comment-4010415-20180513194813

Yeah, I'm disappointed about Hazama not having a Torchwick color palette, too. I think that would've fit a lot better than giving him Adam's palette just because of his clothes.

I think they gave Gordeau Sun's palette because abs.

With the Persona characters, they probably just wanted to play off of the "partners" thing that went on in the initiation in Volume 1 (and then was promptly dropped for the rest of the series).