Krillin ia a man from earth who didn't like Goku at first but then he did and they became the best of friends. When he got older he doesn't really get bigger. He tries his best to fight the sayians but he didn't have much of a chance. Then when he goes to Namek to find the dragonballs he has to team up with Vegeta then later on Krillin get blown up by Freeza and that's what made Goku go SSJ. Krillin after the cell saga doesn't really play a big part. He falls in love with android 18 and they have a little girl named Maron.
