Callie is very cheerful and excitable, and usually sports a grin on her face. She values her bond with her cousin Marie, with the two having been inseparable since they were young. As children, they enjoyed star-gazing and playing tag together. She is particularly attentive to Marie's changes in mood, even noting when the latter wants to drink a latte based on expression alone. When by herself, however, Callie can become upset and prone to overthinking. 

(BTW: This role might have some singing, so if you want to, include yourself singing in the audition whether as yourself or in character)