Callisto is one of the Galilean Moons of Jupiter, she is an emo girl (because a lot of asteroids hit her surface, making her "ugly" [she is REALLY pretty]) and a disinterested one, she is always sad and does not socialize, she enjoys spending time alone and always has negative and pessimistic thoughts, at least she has best friends, Luna and Europa. Io, Titan and Ganymede are also her friends but she doesnt like them really much, she doesnt like boys, and much less the ones who always flirt