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Personas
History
Vulcan's history began on the Shi'ar throne-world, as the unborn child of Christopher and Katherine Summers (parents of Scott and Alex Summers, who would become Cyclops and Havok, respectively). Katherine Summers was pregnant when the Summers were abducted by D'Ken. Corsair escaped in an attempt to save both mother and child, but she was killed in retaliation by D'Ken.
Gabriel was removed from his mother's body and placed in an incubation-accelerator, used to breed new slaves, aging him to the prime adolescence. Sent to Earth to become a slave for Davan Shakari, the Emperor's hand on Earth, he escaped to be found by Moira MacTaggart with little or no memories of who he was or where he came from. She took him as her ward, and instructed him in the use of his nascent powers.
He claimed his name was Gabriel, but he chose the code name of Kid Vulcan from a book on Roman mythology, and Charles Xavier recognized his mental imprint as being related to Cyclops. He was one of the team, including Petra, Darwin, and Sway, that attempted to rescue the original X-Men from Krakoa. Vulcan and his team rescued Scott from Krakoa and Vulcan was able to hurt the living island, which greatly enraged the creature. Vulcan revealed to Cyclops that they were in fact brothers, and sent Cyclops away on their jet to safety. As the jet took off, Cyclops watched in horror as the living island struck down and, seemingly, killed Vulcan and his team. Sway was hit first, and severed in two at her torso. Her body released the last of her mutant power to slow time down around them. As Petra was incinerated, she also reacted reflexively and drew them all below the surface into a cave that her power created. There, Vulcan and Darwin lay dying, and Darwin transformed himself into energy and bonded with Vulcan, thus saving them both.
Listed in Xavier's files, Vulcan was stated to be an omega-level mutant, allied with the nation-state of Krakoa. The new founded country had recently started a resurrection process reviving dead mutants, by a group called the Five, a process which Vulcan's was a part of. He later established residence in the Summer House, bringing various "acquaintances" with him from time-to-time from the mainland. Gabriel lived with his two brothers Havok and Cyclops, his niece and nephew Cable and Prestige, his sister-in-law Jean Grey-Summers, as well as Wolverine in a Krakoan habitat on the Blue Area of the Moon.
It was later revealed that Gabriel never truly died, and that mysterious beings tampered with his "inner good and bad selves," being split personality-wise.