Vegeta Jr is the descendant of Bulma and Vegeta, the latter of the two he is named after. The former vice president of the Capsule Corporation, as well as the former, self-asserted King of the Saiyan homeworld, Vegeta Jr. became the Supreme Kai of Universe 7 after merging souls with the former Supreme Kai, Shin. Later on, he becomes the martial arts teacher of the new God of Destruction-in-training, Citrus.
Not only does Vegeta Jr. share his name with his ancestor, he also is a splitting image of Vegeta. Vegeta Jr. sports spiky black hair that stands straight up as well as his ancestor's signature widow's peak. He has a strong facial resemblance to Vegeta, with dark black eyes and a resting scowl. He is a very lean, slim man, not displaying much prominent muscle mass. His of shorter stature to many of his peers, almost all of them. After striking a deal over the Dragon Radar, Goku Jr. helps Vegeta Jr. grow a tail.
In his first appearance in Dragon Ball GT at the 64th World Martial Arts Tournament, Vegeta Jr. wore a blue, sleeveless jumper suit with short-like bottoms similar to that Vegeta wore in the Buu Saga along with white boots and fingerless gloves. After the 65th World Martial Arts Tournament, Vegeta Jr. debuts his casual clothing, a style he'll be seen in for the remainder of the series whenever not in combat. He wears a long-sleeved white jacket reaching the abdomen with yellow patterns on the shoulders over a blue tank top and fingerless, black gloves. He also wears black pants with a brown belt with a silver buckle that has the royal crest of King Vegeta engraved into it. Vegeta Jr. sports with shows with yellow tips and heels. He is seen with hoop earrings early on in the series but they are changed out for Potara earrings after becoming the Supreme Kai.
As Vegeta Jr. matures he grows more interested in his Saiyan heritage, this is shown in his multiple wardrobe transitions throughout the war against Red Rover. He briefly wears a sleeveless jumpsuit similar to that Vegeta wore at the 25th World Martial Arts Tournament. Soon after his fight with Android 21, Vegeta Jr. dons Battle Armorto honor his ancestors. After becoming Supreme Kai, Vegeta dons armor similar to Vegeta's Whis armor.
During the war against the Time Breakers, he dons armor similar theirs. While the torso of the armor remains the same, it is supported by a single brown strap around the neck instead of two shoulder straps. He wears this over a black long-sleeved jumpsuit and gloves and boots with black patterns around the wrists and ankles.
In his initial debut, Vegeta Jr. was seen to be cocky and prideful just like his ancestor. He is also shown to be rude to those he doesn't respect which is seen when he insults Goku Jr.'s attire at the 64th World Martial Arts Tournament. Vegeta Jr. often prefers to outsmart his opponents rather than try and overwhelm with strength alone. He also seems to harbor the Briefs family intellect as he thought of the conversion of the Dragon Radar into multiple wrist devices.
Vegeta Jr. frequently embraces his Saiyan heritage due to his mother telling him stories of the adventures of the Z-Fighters. He does so much so that he even calls Goku Jr., "Kakarot" as his ancestor did to Goku despite Goku Jr. not being named that. Like most individuals with Saiyan lineage, Vegeta Jr. enjoys combat, more so than the other Earth-based Saiyans. Other than his hunger for fighting, Vegeta Jr. also harbors an enormous appetite. Vegeta Jr. frequently reminds his peers as well as his enemies that he is of royal blood. This is most present when he is possessed by a demon and conquers Sadala as its king.
After his possession, Vegeta Jr.'s character drastically changes. His hunger for battle had completely disappeared, even going on to vow to never fight again. This extreme sense of guilt leads him to turn himself over to the Galactic Patrol for his crimes. Vegeta Jr. does lose his depressed demeanor after merging with the Supreme Kai, but his guilt pushes him to be the best Supreme Kai he can be.
Dragon Ball GT
Shadow Dragon Saga
Main article: Shadow Dragon SagaVegeta Jr. is Goku Jr.'s opponent in the World Martial Arts Tournament. The result of their match is never revealed, but both are seen to have the ability to become Super Saiyans, despite the fact that they are both less than one-quarter Saiyan.
Dragon Ball AF
The finals of the World Martial Arts Tournament are displayed in more detail in Dragon Ball AF. Distracted by his grandmother’s absence, Goku Jr. gets blindsided by a devastating attack from Vegeta Jr. This almost costs him the match, nearly falling to the outside of the ring. Goku Jr. catches himself and manages to launch Vegeta Jr. into the sky. Goku Jr. prepares to finish things off with a Kamehameha, but, due to lack of ki control, fires the blast wildly. Using the blast as cover, Vegeta Jr. slams into Goku Jr., sending crashing to the ground, kicking him to the outside before he hit the ground. Goku Jr. looks on in distraught as Vegeta Jr. is declared the World Martial Arts Junior Champion.