Vegeta

Prince Vegeta is the prince of the fallen saiyan race and arch-rival to Goku. He is the husband of Bulma, the father of Trunks and Bulla, the estranged brother of Tarble, and the great-great grandfather of Vegeta jr.[http://dragonball.wikia.com/wiki/Vegeta_Jr. .] Aside from Goku, Gohan, and Piccolo he is easily one of the most prominent characters in the series, receiving more character development after being introduced than a number of other characters. He was once a young member of the Saiyan Army under the Planet Trade organization, but after his race's demise, he worked alongside Nappa and Raddiz,directly under Frieza