Gosem is the third child, and first daughter of the Son family. Born only a year after Goten, Gosem was only 6 years of age at the time of the Majin Buu story arc. Being the only girl of the family, Chi-Chi refused to let her fight with Goku and the others. Being the daughter of Goku, and sister of Gohan, she could not avoid fighting forever. When Goku left to go train Uub, Gohan also left to become a scholar. Gohan comes to visit every weekend, and when he does he trains his two younger siblings in ways of fighting. Gosem was extremely jealous of her brother Goten, due to the fact that he was able to go Super Saiyan when she wasn't. Eventually, peace on Earth was disturbed. When Goku tried to show Uub the power of the Super Saiyan 3 transformation, he attempted to go over his limitations, resulting in his death. The shock on Uub when he saw it was a extreme blow. Imagine his actual family. Gohan, Goten, and Gosem all felt this. This made Gosem pissed. She then transformed into a Super-Saiyan. After her transformation,15 year-old Gosem had took off. The Z-Fighters haven't heard from her ever since.