Yajirobi
Race: Human
Eyes: Black
Hair: Black
Skin: Light Tan
Appears in: DB, DBZ and DBGT
Killed by: N/A
Abilities: Iai Zari.
Yajirobe was first met by Goku after Goku was defeated by Piccolo's dominion Tamborine. At the time, Yajirobe was quite stronger then the other Z fighters and had a huge appetite! He plays a good role in DragonBall when he carries Goku's limp body up Karin Tower. The next big part he plays was during the Saiya-jin Saga when he cut off Vegeta's tail and tried to fight Vegeta. However, he was too weak to win. After this he does not play any more large roles, he just deliveres senzu beans to the Z fighters and lives the rest of his life on Karin Tower.
Yakon
Race: Darkjin
Eyes: Black
Hair: None
Skin: Green
Appears in: DBZ
Killed by: SSJ Goku
Abilities: Light Absorb & Tobidatsu Tsume.
Yakon was one of the fighters on Babadi's space ship that Vegeta, Gohan and Goku had to get pass. Yakon fought Goku and he has the ability to absorb light and use as his power. So when Goku powered up his aura (the glowing thing around the fighter) was absorbed by Yakon. So Goku went to over loaded SSJ, hence Yakon was full of light and he got blowned up.
Yamcha
Race: Human
Eyes: Black
Hair: Black
Skin: Light Tan
Appears in: DB, DBZ and DBGT
Killed by: Cyba Men
Abilities: Bukujutsu, Kamehameha, Rogafufuken, Shin Rogafufuken, Sokidan & Zanzoken. Yamcha is one of the Z fighters. He was first seen with Puar as a bandit trying to steal the dragonballs, once Goku, Bulma, and Oolong found them. But he never could because everytime he saw Bulma, he got nervous. So pretty much any girl he sees, he gets nervous. Furthermore he would steal the dragonballs and make a wish so that he doesn't get nervous when he is near a girl. He also goes out with Bulma, but later break up.