Ganymede is the biggest moon in the Solar System, being one of Jupiter's 4 Galilean Moons. He likes to brag about this a lot to anyone he meets. His fellow comrades are Io, Callisto and Europa (who he is dating). Still, he is flirtatious to many girls and will give most of his remarks in a subtle way. He has a lot of pride in himself and his leadership capabilities, although it hides his low self esteem. He's fine with manipulating others in order to get what he wants, and is mostly successful.