>>49282812She's mysterious and refined, with the long blonde hair and the black trenchcoat with furry trim. She studies mythology and generally appears at random to help out without much explanation before disappearing again. She gives an impression of importance but you don't really know what, aside from the obvious meta knowledge that she's the champion.
Roserade and Milotic are very graceful. Spiritomb and Togekiss are both very rare and mysterious, with Spiritomb also essentially being the embodiment of pure evil, evidencing that Cynthia is an exceptionally strong trainer to capture and train one. Lucario was also originally marketed as being fairly mysterious, as this stoic aura reader pokemon that has a telepathic connection with humans. Garchomp is also powerful and rare, but I find the largest coordination with her to be the actual aesthetic of this dark, intimidating land-shark. The only pokemon she uses that don't really match are Gastrodon and Porygon Z. Umbreon would make sense because she's literally dressed like an Umbreon though, yeah.
>>49282961I actually hadn't considered that, I would also like it a lot more if it leaned more into the direction of royalty like that. Maybe something like Gardevoir, Tyrantrum, Bisharp, Vespiquen, Jellicent, and Aegislash? Only problem being that more than half of her team are from prior gens, and there aren't many Gen 6 pokemon that carry a 'royal' aesthetic.