>>56741229Blue is the rival, Lance has the team rocket events and lake of rage, Wallace yeah he's kinda just there, Cynthia follows you throughout the plot, Alder just kinda exists, Iris is funny and cute, Diantha shows up once to talk Lysander and leaves, Kukui is the professor and Hau is your friend you see develop into a more serious competent person, Leon is used constantly through gen 8, and I will never buy SV so I can't comment on it.
You'll notice Diantha sits with Alder and Wallace in "literally who?" to most people.