thumb|300px|left|Trunks ThemeTrunks is the half Saiyan, half human son of Vegeta and Bulma. He is best friends of Goten , son of Goku, and brother of Bulla. His cool alternate timeline counterpart is Future Trunks.
Present Trunks is shown to be very cocky and belligerent like his father Vegeta, as well as mischievous, most likely due to the fact that Trunks grew up with his father Vegeta and enjoyed the luxuries of peace, while his alternate timeline counterpart grew up without Future Vegeta and in an apocalyptic world. Trunks tends to usually take control over the younger Goten, his best friend, stating to him numerous times how he is both older and stronger (during childhood). Trunks at first also has his doubt about Goku, whom he originally believes is not as strong as his father. Later on, Trunks does gain more respect for Goku after seeing Goku's Super Saiyan 3
power in action. In his later years, Trunks adopts a personality similar to his future counterpart's. During and in between his battles at the World Martial Arts Tournament, he acts just like his father does, calm when he fights and insults his opponents. He doesn't act like this however during his battle with Goten because, it is a battle he could possibly lose. However, they do talk during the battle, assuring their opponent that he won't win. Trunks seems to really enjoy fighting as a child. This is apparent because of how much he wanted to become world champion, ten years after Kid Buu's defeat Trunks seems to not care about fighting anymore.