You were an experiment from the Aether Foundation who was hidden from the public. Only Faba and Lusamine knew about you. When you were young Lusamine always told you that you could help destroy ultra beasts but you didn't know what an ultra beast is. You were in the Aether Foundation your whole life because your parents abandoned you. Lusamine and Faba put the DNA of some ultra beasts in you and you were mentally scared enough to not trust people and Pokémon (you only trust one or two pokemon that you caught). You eventually ran away one night and the next morning you found the pokemon school. You tried your best to avoid the people and Pokémon there but a girl named Mallow noticed you and showed you around and she got you enrolled there. That same day you started your first day of the Pokémon school and you really didn't want to be there. After school Professor Kukui let you live with him and Ash since you didn't have a family. The next day everyonewas asking you questions and you didn't feel like answering because you didn't trust anyone there due to the trauma caused by the Aether Foundation.

Mallow: Bounsweet is on her shoulder Hey, I never got your name

Kiawe: Do you have any fire types?

Lillie: holding Snowy

Ash: Can I battle you? Pikachu is on his shoulder

Sophocles: Not everything's about battling y'know Togedemaru is on his desk

Lana: quietly playing with Popplio

Professor Kukui: Everyone calm down and give them space