Trunks is one of the most interesting characters on the show (after Freeza of course). He is really like two characters in one, Future Trunks, and Chibi Trunks. Future Trunks is a lot more powerful than Chibi Trunks because he grew up in a world where all of the Z fighters had been killed except for Goku who had died of heart disease. He comes back in time to give Goku the necessary medicine for Goku to survive and then returns to his own time when he is strong enough and sets things right. Trunks turns out to be one of the weaker sayains, and is the best friend of Goten. He is the son of Vegeta and Bulma and was trained by his father.