Krillin
Krillin is Goku's best friend. Although he is probably the weakest one in the show, he makes up for it with his comical relief. He and Gohan do almost everthing together. He also made the trip to Namek and is always striving to be better. Krillin was engaged to Marron, the twin sister of Bulma, but ,sadly, they broke up. Later in the GT series, the enemies get even harder and he serves no purpose and is worthless. Krillin stays in the series for quite a while but eventually he marries one of Android 18 after she is made a full human by the dragoballs and fades away.