Cell (Dragon Ball character)
Upon being resurrected by the Dragon Balls and returning to the future, Trunks destroys Androids #17 and #18, though realizes from his time travel that Cell is likely to emerge soon. Three years later, Trunks is confronted by the Cell of his timeline, who plans to kill Trunks and use his time machine in the same way his alternate self had. Future Cell realized Trunks traveled back already and learned of him in the past but thinks Trunks is no match for him. However, Trunks showcases his newfound power and easily kills him, finally bringing peace to the future.