Callisto

"'....'"Callisto is the fourth and farthest moon from Jupiter, a member of the Galileans, and in the Exos a silent one. Callisto does not speak, partakes in both feminine and masculine activities, and has an impossible to understand personality.

Appearance
Callisto's head starts off gray and near the eastern end switches to a blue, and is dotted with white. Their clothing is all gray, and dons no symbolism or icons. Callisto's pants are a dark gray, and everything else is you get the picture.

House Appearance
Callisto is the only Galilean to not have a house; instead, Callisto prefers one of the apartments in Jupiter's designated minor moon area. It is bland, like Callisto, and dons no posters. Callisto has no forms of communication, instead using a radio.

Personality
Callisto does not speak, instead preferring to represent feelings or words with objects or miming. Their voice is implied to be haunting and if raised will cause a "curse" to appear. Callisto seems to partake in both feminine activities and male activities at once, which rules out any sort of gender. When near the Sun, Callisto seems to act out ruder actions such as flipping the bird or throwing rocks, etc. This also seems to go to Ganymede and, for unknown reasons, Earth and Moon.

Callisto seems to have imaginary friends, as an empty box in their room often is mimed as "Friend".