Rex had the night watch on the Ghost, which meant he had nothing to do, as the ship was travelling through hyperspace. He spent some time reading through mission reports, before deciding to go for a walk.

Rex soon ended up walking through the area of the ship where the crew cabins were located, and heard the unmistakable voice of Chopper, the eccentric astromech droid, seeming to come from Hera's cabin. Strange, Rex thought to himself. Wasn't Chopper was supposed to be repairing the Phantom? He soon heard Hera scream, and ran toward her door, believing his commanding officer to be in trouble. However he was shocked to hear Hera say "Chopper, you magnificent beast!"

Nine months later, Jacen Syndulla was born. The unholy spawn was a frightening sight to the doctors who delivered him, for he looked mostly human, but had bright green hair, and utility probes coming out of his torso. Instead of crying like a typical infant, the newborn spoke astromech.