Future TrunksTrunks first appears in chapter #331 The Young Boy of Mystery (謎の少年 Nazo no Shōnen), published in Weekly Shōnen Jump magazine on July 15, 1991.[1] Here he is a mysterious seventeen year old capable of transforming into the Super Saiyan state, who appears and singlehandedly kills Freeza and his father, King Cold.[4] Upon Goku's return from Planet Namek, Trunks confides in Goku his tragic story.[5]
As told in the stand-alone manga side story Trunks: The Story - The Lone Warrior (TRUNKS THE STORY -たったひとりの戦士- Torankusu za Sutōrī -Tatta Hitori no Senshi-) and chapters #419 and 420,[6][7] Trunks has traveled from twenty years in the future where the world is in constant ruin due to the terror of the two androids #17 and #18 which were created by Doctor Gero, the former chief scientist of the Red Ribbon Army. By this time, Goku has succumbed to an unknown heart virus and everyone, with the exception of Gohan, has fallen at the hands of the artificial humans.[8] Trunks has been living with Bulma and secretly training with Gohan. After Gohan's inevitable death, Trunks assumes the mantle of Earth's sole protector against the artificial humans for the next three years until Bulma finishes her time machine. Once he informs Goku of the events to come, Trunks gives Goku a special medicine[8] and returns to his own time.[9]
Trunks returns to help in the present day battle against the artificial humans. With the appearance of Cell, Trunks trains with Vegeta in the Room of Spirit and Time. After Vegeta's defeat, Trunks fights Cell in his newly gained Perfect state. However, Trunks' new Super Saiyan grade proves to be ineffective so he willingly concedes. He later participates in Cell's martial arts tournament, where he is killed by Cell. After Cell's defeat, Trunks is restored with the Dragon Balls, upon which he returns to his own timeline in the future and defeats the artificial humans and Cell within his time.
Years later, Trunks encounters a new enemy known as Goku Black and is forced to retreat to the present timeline. He is shown to be able to reach Super Saiyan 2. During Goku and Goku Black's fight, Trunks' time machine is destroyed, leaving him stuck in the present era.[10] After a reunion with Gohan, who he sees content with being a family man in the presence of his wife Videl and daughter Pan, Trunks becomes encouraged to defeat Goku Black in order for the people of his own timeline to have a chance at that same happiness,[11] also having a reunion with Android #18.[12] Trunks then receives training from Vegeta, vowing to surpass both his father and Goku Black in strength.[13] Trunks then travels to the future to counter Goku Black (who is later revealed as Zamasu in Goku's body, but from another timeline),[14] dueling Zamasu (from Future Trunks' timeline) instead.[15] After his defeat, Trunks heals in the past and returns for a rematch. During the fight, Trunks becomes enraged when Goku Black blames him for all that has happened because of the use of the time machine, and transforms into an unknown Super Saiyan form. After numerous fights, including Goku Black and Zamasu fusing with the Potara earrings, Trunks gathers the energy from all remaining life on the planet into his sword and cuts Fusion Zamasu in half. Despite losing his body, Zamasu's essence began to envelop the entire universe, before being destroyed alongside the entire multiverse by that timeline's version of Zen-oh. Trunks and the others retreat to the past. Goku later invited Trunks to get Future Zen-Oh. The two go back, with Trunks and Mai bidding their farewells, returning afterward to a future timeline where Zamasu hasn't schemed his plans, and where there is an already existing Mai and Trunks, Bulma, and the comrades that were killed by Zamasu in Trunks' original universe.