Maya begins stop-motion animation, but AVI keeps breaking character—preening, squawking, flying onto her shoulder mid-shot.
Avi is a standout character because he proves that "gross" or "scary" animals can embody the most heartwarming human traits. He is a solid piece of the Jentry Chau narrative, providing the necessary heart and humor to balance the show's supernatural darkness.
He is one of the best friends of the main character Oona .
You described him as a "solid piece," and narratively, that is his exact function. In a show populated by demons, ghosts, and complicated teenage drama, Avi is the emotional anchor.
If "AVI" refers to a character or an animal mascot from entertainment and media, here are a few possibilities: