Krillin

Probably the most powerful earthling on the show, Krillin is one tough little guy. He is one of Kamesennin's disciples, and he trained with Goku. He is a hearty fighter, with a good heart. He ends up becoming Gohan's martial art partner, and they make a good team

He looks after Gohan  a lot during the Freeza Saga. He has a few good moves, and he knows how to fight. He started his martial arts training so that he would ebcome buff and strong. He hoped this would land him a girlfriend. It did later on when he found Marrion in the Garlic Jr series.. He later on marries #18 and has a daughter named Marron.

Krillin usually gets beaten up in a fight because he takes on stronger foes. In the Cell Series starts to stop fighting because he has grown back a thick head of hair, and because of #18

I would say that Krillin is a real brave little guy. He is a pretty tough guy who knows what to do in a dangerous situation.