Rewrite the given paragraph while keeping the meaning and length, but using different words and phrases. Nappa is a highly skilled Saiyan warrior who accompanied Vegeta to Earth in search of the Dragon Balls. He has been Vegetas companion since his childhood and possesses a somewhat aggressive personality, even among Saiyans. During their encounter with Tenshinhan and Chaozu, Nappa demonstrated immense strength which drained their lives, but was ultimately defeated by Son Goku who had returned to Earth after receiving new training from North Kaio. Vegeta ordered him to cease fighting Goku due to Gokus clear superiority over him. Unfortunately, Nappa met his end when he was executed by Vegeta following Gokus victory over him.