Frieza

This character used to be the strongest person in the universe, He was known as lord Freeza and was a threat to all life. He only used his powers for evil and wanted to be supreme ruler but Goku managed to beat him, before it was not too late. He has a known Brother who was shown cooler) and his father King Cold, Cooler was killed by Goku, or so was thought Cooler came back even strong then before he was now meta Cooler and he was powered by the big get star eventually Goku and Vegetea killed him. Later on in the series Freeza also came back and this time with his father it turns out Freeza was saved before he appeared to die and he had robotic parts attached to him to replace the limbs lost. Although Freeza came back stronger then before Future Trunks came and destroyed both him and King Cold

http://www.homepagez.com/dragonballaf/frieza.htm