hex maniac (pokemon) in top right? Obvs we don't know this character yet, but considering the Chandelure in the scene (which she might be running after), the gothic fashion, the same black/eggplant(?) color with purple accents... she does look like an aged up Hex Maniac imo. But we'll have to wait and see. Added character request tag in the meantime (other NPC classes could also be tagged when we learn abt them, not just hers)
Edit: The girl outside the Pokemon Center in the top left kinda resembles a Kalos ace trainer (pokemon) too (blonde hair, black skirt and socks with purple trim, purple hair accessory, white ribbon tie, etc) but it's hard to say