Io is always angry, so she doesn't have many friends. Europa acts like a normal teen, and doesn't care very much about the others. Ganymede is like the big brother of the moons, though he sometimes can get cocky when encouraged. Despite this, he still cares deeply for them. Callisto is friendly and kind, and she enjoys hanging out with others. She also has a very bubbly personality, and still enjoys watching Sesame Street and Blues Clues, despite being the oldest moon.