Mathazar (LOTSG)

Mathazar was an Earthborn Saiyan and the best friend of Bruse, he was also the guardian of Kaestos after Bruse and Chaya died.

Mathazar died to Zero during the tyrant's invasion, his death was not in vain however as Kaestos' rage allowed him to attain Super Saiyan 3 and kill Zero.

Trivia
Fairly certain Mathazar is a username I once had, so, once again I was a bit lazy.