Nemona

A champion level trainer at Naranja/Uva Academy as well as the student council president there. She's the protagonist's main rival wishing for them to train up and be an equal to her since she has to find anyone close to her. She's quite plucky despite her inherent loneliness from being too powerful, though she also has a tendency to follow the protagonist around like a stalker probably in an attempt to get them to battle since she loves that so much it's like she can't think of anything else to do. She also comes from a wealthy family but that never seems to come up and you'll likely forgot about that part once you chose your starter anyway. Once they're done helping everyone's quests, she joins with the protagonist, Arven and Penny to the journey down Area Zero in pursuit of powerful foes to beat and possibly capture.