Captain Nathaniel Flint

Background Captain Nathaniel Flint belonged to an unnamed alien species with fangs, multiple eyes and a reptilian-like face. At some point in his life, he became a pirate, and his infamy was so staggering that he was known as the most feared of all pirates. His success was largely due to having discovered a mysterious planetoid built by a highly-advanced species of unknown identity. Flint found that he could use a portal found on Treasure Planet (which is in fact a giant alien mechanism) to ambush merchant ships and then escape back to his base. After years of looting, the pirate buried a vast treasure in the planetoid's center chamber. Such was Flint’s greed that he desired to keep the hoard to himself even in death. He entrusted the map to Treasure Planet to his first mate Billy Bones. Flint also rigged the planet to explode if someone should find his treasure and stole the primary memory circuit of his navigator, B.E.N., to prevent the robot from warning any would-be plunderers. Shortly after setting up this deadly booby trap, Flint died guarding his treasure trove.

Captain Flint ends up on a new planet, one with a huamn auction house, one selling young kids, ranged 18 to 20 to whoever would be wilking to pay a high enough price for them. He saw one of them being smaller than they should've been, and decided then he'd intervene, not out of kindness but out of his own selfishness of thinking how he could take the kid to train.