Future Bulma Brief
From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Due to the apocalyptic world that she raised her son in, she seemed much more hardened and serious than her main timeline counterpart, who was happy and easy-going. She was easily the wiser of the two remaining Z Warriors, attempting to convince Future Trunks to not attack the Future Artificial Humans head-on and instead use the Time Machine. She reminded him that although he was able to become a Super Saiyan, Future Son Gohan also had that ability and he had failed.
Future Bulma appeared in Dragon Ball Z: The History of Trunks and during the Perfect Cell Saga. She was the widowed mother of Future Trunks Brief and, aside from her son, the last surviving member of the Z Warriors in her respective timeline. She played a small and largely unseen, but very important, role from the Trunks Saga through the Perfect Cell Saga, creating the Time Machine that enabled Future Trunks to go back in time to the main timeline in the first place to warn everyone of the Future Artificial Humans.
Dragon Ball Z: The History of Trunks
Main article: Dragon Ball Z: The History of Trunks
Up until the Trunks Saga, Future Bulma's biography was exactly the same as that of her mainstream counterpart. In August of 764 Age, she watched the battle, as Future Son Goku, traveling back to Earth via Instant Transmission, defeated Freeza. Two years later, Future Bulma was seen outside the house, as Future Goku died from his Heart Virus, holding the six-month-old Future Trunks in her arms. Six months following Goku's tragic death, two killer Artificial Humans attacked on the May 10th, 767 Age. All of the Z Warriors with the exception of Future Son Gohan were murdered by the robotic killing machines, and thus a new apocalyptic age dawned on Earth.
Thirteen years later, after the final hope for Earth - Gohan – was killed, Bulma devised a plan to defeat the Artificial Human who were attacking their world. She would send her son back in time and solicit past Goku's help in defeating the Artificial Human since he never even got a chance to fight them at all in her time. It took some convincing, but Future Trunks eventually agreed for his own reasons (whereas Future Bulma merely wanted the satisfaction of knowing that at least one timeline was saved, Trunks intended to find a weak spot in the Artificial Human so that, even though he may not be able to revive those already dead, he could at least save those still alive). Finally, four years later in 784 Age, the time machine was completed and Trunks made his voyage into the past.
Free the Future
Main article: Free the Future
Later, when Future Trunks returned from the past, Bulma was both astonished, and not astonished at the fact that Goku died anyway by sacrificing himself to save the planet (her exact words were "That sounds just like Goku"). She was completely astonished at how Vegeta had defended her son when he died. Later, when the Artificial Humans were on the move again, Future Trunks went to fight, and this time, she believed in him, and merely asked him to be careful.
Finally, as Trunks was preparing to go back in time once again to tell his dead friends that he managed to beat the Androids, Future Cell attempts to steal his time machine. Future Bulma is last seen teasing Trunks about a new girlfriend, but quickly goes inside when she sees how serious her son is.
- Surprisingly, it does not seem that Future Bulma associates much with Future Chichi.