Avery

Avery is the student counsellor of his class but not only that he's overall, on top of his class in the ways of grades and his knowledge of the Paldea region but when it comes to pokemon battles he has a long way to go.
Even though he's kind, he is strict and serious in many aspects, especially when it comes to his ability to achieve things perfectly and he believes his Pokemon should be without fault...or at least that was his initial idea, learning the ways of being trainer throughout his journey he realizes that not only his pokemon but himself are flawed but that doesn't mean they aren't worthy of love, respect and kindness.
So in away, he learns that he, as well as his pokemon, with all of their flaws, were already perfect and they needn't change to impress anyone.