Korrina, Princess of the Fleur Syndicate

You didn't think Diantha would be conquering the whole region of Kalos by herself, did you? Of course not, she's got to have a few certain partners to help her along... Korrina was actually the first key figure Diantha approached about working for the Syndicate, primarily because Diantha wanted to ascertain details on Mega Evolution to strengthen her Gardevoir. There was... a fair bit of resistance, to be certain, but one way or another, eventually she was seeing things Diantha's way... and, well, here we are now.
Korrina is perhaps the most unlike her normal self, having ditched the roller skates and athletic training to act like a spoiled young princess in Shalour City, even treating the Tower of Mastery as her castle- she has a variant of Fleurified Lucario as her partner, but Diantha's process wasn't quite perfected by the point of her 'recruiting' Korrina... thus his typing became more Dark/Fighting instead, and he acts a lot more violent and overprotective of his Trainer, much like Prince Adam in Beauty and the Beast (all the more fairytale references, naturally). 

On a developmental standpoint, I feel like the hairstyle is the strongest part of this design; Korrina's outfit doesn't exactly lend itself to a lot of intricate design when looking at something more 'elegant' or princess-ish. But curling out her blonde hair was rather fun to work with, and the tiara she wears is meant partially to reference her helmet for further inspiration. Probably one of the weaker designs among the cast imo, but it does its job being quite different from her original self, so that's the best I could ask for.