Kougu is a shy and studious intellectual child. As a child, he lacks the Saiyan fighting spirit. He must utilize his incredible half-breed Saiyan potential and emotional reserves to protect those he loves, becoming one of the most powerful New Z Fighters. As an adult, he achieves his dream career of becoming a great scholar.
Kougu, being only half-Saiyan, is unusual in his values and personality. These unique values and personality separate him from pure Saiyans; as powerful as he is, he does not like fighting much. However, when he is forced to fight, he shows special interest in protecting his family and friends. Like his father, Trunks Jr., Kougu has a pure and gentle heart. Also like his father, he has the typical Saiyan appetite. Besides concerning himself with his family (and his studies), Kougu has a strong attachment with his mentor: his father's former archrival named Flute. Flute was forced to train Kougu after the death of Trunks Jr. At first, the relationship with Flute is a frightening one, but after just one year, Flute admits his change because of the friendship he develops with Kougu and even sacrifices himself to save the boy. Because of this, Flute can be considered as a surrogate father for Kougu. Goten Jr. also has influence on Kougu, as almost an uncle/nephew relationship, mainly because Goten Jr. is Trunks Jr.'s closest friend. Though he claims he does not share the love of fighting Trunks Jr. has, Kougu does indeed love martial arts and adventure. It is also clearly obvious he greatly enjoys being a hero.
AppearanceEditKougu's appearance changes drastically through Dragon Ball SS, due to the fact that the series starts out with him as a child and ends when he is fully grown, married, and with a child of his own. But Kougu's basic physical appearance pretty much stays the same through the course of the series. Kougu has light blue hair and yellow eyes, he also has his mother's light peach complexion, rather than his father's light tan. Kougu also is quite muscularly developed for his age. As an adult, he looks slightly taller than Gohan, but he is also a little bit thinner.
When Kougu is first introduced, he wears a blue and red edition of kid Gohan's training outfit.
After training with Flute, he has a mullet-type haircut.