>>47323182They're not particularly interesting, kind of interchangeable in the sense they all act fairly positive.
Red: Almost entirely silent protagonist, he has one single line in the game when Flint is asking him why he doesn't speak and how he gives commands to his Pokémon ("...Words are unnecessary!")
Leaf: Cheerful girl who is a Trainer I guess?
Ethan: Cheery outdoors fanatic
Kris: Likes studying Pokémon and has great respect for professors
Lyra: Acts like a senpai, essentially the supporting character from HGSS but also has battled Red
Brendan: Looks up to his dad Norman, competitive Trainer, implied crush on May
May: Professor Birch's daughter, enjoys doing fieldwork, apparently also likes contests
Lucas: Not added yet, presumably Rowan's assistant
Dawn: Also a senpai Trainer, likes contests and seems to be the main protagonist
Hilbert: BW protagonist, competitive and friendly, wanted to speak to N for a while
Hilda: Battle fanatic with a one track mind
Nate: Friendly protagonist, most interesting display of personality was when he told Ghetsis he hates him for everything he's done, and later broke into tears over N not being able to have the family he wants
Rosa: Genki
Calem: Pretty chill and mature, initially struggles with teamwork
Serena: Cheerful and confident
Elio: Braindead Alola protagonist, slightly more competitive than Selene
Selene: Braindead Alola protagonist, cheerful
Chase: Not added yet
Elaine: Not added yet
Victor: Not added yet
Gloria: British, competitive, likes curry