Trunks is shown to be quite cocky and stingy just like his father, as well as mischievous Trunks is the firstborn child and only son of Vegeta and Bulma.

Vegeta is arrogant throughout the series and becomes bitter due to the abuse his race suffered at the hands of Frieza, as well as his injured pride due to repeatedly falling short compared to another Saiyan. Vegeta was once a ruthless, cold-blooded warrior and outright killer.
Vegeta:"Ready trunks?"
Trunks: "Yeah dad!"