Son Goku (Kakarot)
This here is Son Goku. In Dragon Ball Z, he is known as the legendary saiyan warrior, the strongest in the universe! He comes from a different race, a race called Saiyans. They conquered on their home planet, Vegeta. Goku is the son of Bardock, the first and original Super Saiyan. Bardock knew planet Vegeta's fate, for he was the only one. He was actually cursed with the ability to see the future, and knew his planet's fate... and all of its people as well. He had a view of his beloved planet being destroyed, and he thought he was the one destined to kill Freiza. He makes the best of his attemps to kill Freiza before all else fails. But then again, Freiza was handled with ultimate power and he made his biggest deathball, which eventually, destroys planet Vegeta. Why am I explaining more about Bardock and not his son, Goku? You'll see in a moment. Back to the story- So, as Bardock is finally dying, he finally realizes that it is not his destiny to kill Freiza- it's his son, Goku! In his after-life, Bardock talks to Goku, who was sent to Earth before the destruction of the planet. He told his son to finally defeat the overlord Freiza and to use his anger of all his loved ones being killed to finally end Freiza once and for all. This is the moment when Goku's rage ends up with him transforming and becoming a Super Saiyan, a legendary warrior. In the show, Goku is the main character and is the destined one to be the strongest in the universe. Even though he was born as a lower-class warrior, he recieves the ultimate training from the Kai's and especially, King Kai... hence, the name, Dragon Ball Z Kai. Goku reaches levels far beyond one has ever imagined! His actual name is Kakarot. A legendary Super Saiyan Warrior destined to keep the universe in check, as he has devoted he life into it. He, is the greatest character in Dragon Ball Z.