Freeza is the brother of Cooler. Freeza was once the strongest being in the universe. He destroyed Vegeta's father and his planet. He traveled around the universe conquering planet's and selling them to higher authority or destroying them. When he traveled to the planet Namek, he was looking for the Namekian dragon balls to wish for immortality, but he found some of the Z-Warriors there to stop him. Goku soon arrived stronger then ever and destroyed Freeza. Goku couldn't save the planet though. As Freeza's body parts were drifting in space, his father found them, and rebuilt Freeza as strong as the last. He made him into a cyborg. He soon tries for revenge on Goku, but Goku defeats him once more.