Rosie is Emma's best friend in Jessie.

She first appears in "Make New Friends But Hide the Old", where it is the first day back to school and Emma befriends her, but Rosie fights it until the end, where they become friends. She also appears in "Green-Eyed Monsters" and "Trashin' Fashion". She says in "Make New Friends But Hide the Old" that she lives with her mother, father, grandmother, three brothers and two sisters.