Jubilation Lee, known as Jubilee, is one of the X-Men’s most popular and beloved members. But her status as a fan-favorite didn’t save her from being depowered in the infamous M-Day event, where Scarlet Witch used her reality-warping powers to de-power the vast majority of the world's mutants. While the young X-Man and Generation X member no longer had her mutant powers, that didn't stop her from fighting for Mutant equality and being an all-around superhero.
After losing her powers Jubilee would find herself running various organizations aimed at helping other recently de-powered mutants. Outside of her philanthropic work she of course teamed up with her remaining mutant friends, the X-Men, from time to time and even joined the New Warriors for a bit. But Jubilee found herself imbued with a different set of powers after a vampire suicide bomber released a vampiric bioweapon and infected her in Victor Gischler and Paco Medina's X-Men #1.
While the infection was slowly turning her, she was taken over by a hypnotic suggestion and would then flee to her vampire masters where she was bitten by Dracula’s son, Xarus, and turned into a full-fledged vampire. Xarus used her as bait to draw Wolverine in, which allowed Jubilee to turn him into a vampire as well. Wolverine then led a group of vampires to attack the X-Men’s base Utopia, though Cyclops revealed he had planned for this by planting groups of nanites in Wolverine's blood. Eventually, Xarus is killed and the vampires are defeated, leaving Jubilee in the X-Men’s care to find a cure after both Cyclops and Wolverine reject Blade's suggestions that she be killed.
After a mission with Wolverine initially leads to tension between Jubilee and X-23, the two eventually bond over their common urges to kill. This leads to a friendship, with X-23 teaching Jubilee how to control her new vampiric urges and Jubilee teaching X-23 how to embrace the more normal aspects of life.
Jubilee would later join the Forgiven, a group of Vampires who had learned how to live without blood and go out in the light, as a student learning to control her vampiric urges. Jubilee would continue to thrive with her new vampiric powers, much like she did when she lost her original powers. She continued to team up with the X-Men on multiple occasions, adopted a human baby named Shogo, and became a teacher at the newly renamed Xavier institute.
It was this new position as a teacher that eventually led to the return of her mutant abilities and the end of her days as a vampire. After Monet falls under her brother's influence and attacks the school she fights Jubilee and takes the amulet that protects her from sunlight before throwing her out of the school to be burnt up by the Sun's rays in Christina Strain and Amiclar Pinna's Generation X #86 in 2018. To save her, Quentin Quire sacrifices his last shard of the Phoenix Force to save Jubilee by curing her of her vampirism and reigniting her mutant powers as well.
Jubilee’s journey after losing her powers in the M-Day event was one of change, perseverance, and growth. Instead of lamenting the loss of her powers, Jubilee set out to help others in any way she could. Although her vampiric abilities might seem like a blip in her greater history, Jubilee spent the better part of a decade as a member of the unliving before she could light up her fireworks again.