Piccolo:He is Gokus Rival but becomes Gokus Friend.He trainned Gohan for Vegeta and Nappa!He fused with two Nameks...Nail and Kami becoming a Super Namek was stronger then a super saiyan.He fought Cell and Won,then When Cell got Stronger he lost.He got absord by Buu,making Buu wiser!He plays a good role in DBZ!
Nail:He is Gurus Loyal Bodyguard,he fought Freiza so Dende could tell Krillin and Gohan the Password for the namek dragonballs.Nail risked his life to save Guru and the Nameks,and got badly beaten by Freiza..He fused with Piccolo after Frezia Beaten him up,and when Piccolo fought Freizas 2nd form,Nail's power helped out!
Dende:He is the little Namek from Namek.He is good friends with Nail,Krillin and Gohan.He becomes Earths Guardian after Kami fused with Piccolo.In the Buu Saga he was the only suvaior from Buu because Mr. Popo threw him off the lookout.
Kami:He is the other half of Piccolo.If Piccolo dies so does Kami...he also helps Goku out when Goku died.He also beat Garlic Jr. father,thats why Garlic Jr. hates Kami so much.
Guru:He is Nameks Guardian but died two times and the 2nd time he never came back =*(