Nappa

Nappa (ナッパ, Nappa) was an elite Saiyan warrior from Planet Vegeta, and Vegeta's partner in combat. Prior to the destruction of Planet Vegeta, Nappa was the general of the Saiyan Army and aid/partner to the young prince, Vegeta. After his race's demise, he, along with Vegeta and Raditz, worked as soldiers directly under Frieza, which led him to Earth.

"Future" Trunks Saga
When Goku and Krillin were sent into a forest to retrieve a special herb for Master Roshi, an illusion of Nappa and many other villains from the Z-Fighters' past show up to challenge the duo. Even though Nappa didn't kill Krillin, his appearance still terrified him, and Krillin ended up being surrounded by multiple illusions of Nappa. He tried to fight them by using the Solar Flare and Destructo Disc, but it didn't work. Krillin did see a specific energy from the bisected Nappa before it reformed, and Krillin made all of the illusions of Nappa freeze by conquering his fears. After beating one Nappa, they all disintergrated as Krillin had finally conquered his fear of the past.

Super 17 Saga
In Dragon Ball GT, Nappa escapes from Hell with the rest of the evil departed thanks to Dr. Gero and Dr. Myuu's dimensional hole.[7] One of his first acts upon resurrection is to destroy an entire city (like he had done when he first landed on Earth in Dragon Ball Z). Although Vegeta gives him a chance to escape, Nappa furiously lunges at Vegeta in an attempt to avenge his own death. Vegeta easily kills Nappa once more with his Energy Palm wave. He is later seen in Hell alongside General Blue, Staff Officer Black, and Major Metallitron approaching Piccolo, who presumably defeats them.

Hell Gates Saga
Nappa escapes Hell, but is defeated once again by Vegeta.