Ah, Android Seventeen. As beautiful, and cold, as a glacier. Seemingly thin and fragile, his strength is monstrous... but only eclipsed by his chilling egocentrism. His desire to have fun is beyond child-like, and in both the Mirai and mainstream universes, it is his ultimate motivation.

In typical teenaged-rebellion fashion, Seventeen decided to claim his independence from his "father." However, with a cool grin on his face, he swiftly decapitated the man that gave him life, and led his twin Eighteen and fellow creation Sixteen on a quest for Goku's head... with a few diversions along the way.

His boyish love of games left him blind to the danger Cell posed, until it was too late. Seventeen was the first to be swallowed by Gero's final project, and despite being restored after the battle with Cell was complete, he virtually disappeared from the scene. We know he survived, though, for he makes a brief cameo at the tail end of the Buu saga, apparently living his life in solitude.