Kiden is a 16 year old girl from Alphabet City, a Manhattan neighborhood. After witnessing her father being murdered as a child, her family falls apart, and she delves into drugs.
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History
Wannabe
Nixon's father, a policeman, was killed in a drive-by shooting. Now a teenager, she acted out by stealing, using drugs, and associating with criminals. She discovered her temporal stasis ability during a confrontation with a gang member, Hector, who was beating her friend. Time seemed to stop, but when she simply touched Hector's arm, time started again and he had a broken arm. Again Hector tried to get revenge of Kiden, this time using a gun. Freezing time Kiden avoided the bullet, sadly Cameron Palmer, a teacher at Rudolph Giuliani High School, was shot instead. Afterward, she ran away to protect herself and her family.
While on the streets, Nixon experimented with her powers while living with a group of homeless. She was visited by the ghost of her late father, telling her to save Cameron Palmer from committing suicide. After saving her former teacher Kiden tried to explain she was a mutant and that she never meant for Cameron to get hurt. Cameron laughed off Kiden's claims, thinking it was a joke.
Kiden's father visited Nixon yet again, telling the two they needed to save X-23, who had fled from her pimp, Zebra Daddy. While on the run with X-23, the trio also came across a young woman by the name of Catiana who was also fleeing for her life; only she was running from a mutant-hating mob. Zebra Daddy asked Felon, a lackey of his, to retrieve X-23. After searching for the girls, however, he had a change of heart and helped the girls instead.
A confrontation brought them all together and it was then that they eventually learn that it was Zebra Daddy himself who had shot Nick Nixon; Kiden's father. it wasn't until Felon returned home that it was discovered Kiden's father's ghost who had been appearing to not only Kiden, but also Felon himself, was actually a mental projection of Felon's younger brother.
No Way Home
Following their escape from Zebra Daddy, X-23 parted ways with her friends, and Kiden, Tatiana, Bobby, and Lil' Bro found an apartment together. Aided by Cameron Palmer, Kiden soon found a job at a nearby cafe, supplementing her income with dumpster-diving. This came to a sudden halt when Cameron was kidnapped. Believing that she owed Cameron for all of her help, Kiden resolved to find her, and Tatiana and Bobby reluctantly agreed.
In their search for answers, the three attempted to meet with one of Bobby's acquaintances from his former life as a gangbanger, but the acquaintence was not at home, and instead they encountered an enforcer, who attacked Tatiana. In a desperate bid to defend herself, Tatiana bit the enforcer, and the exposure to his blood caused her to take on his appearance. In a panic, the enforcer shot Tatiana in the chest.
Reunion with X-23
Some time later, Kiden and her friends were living homeless. One night, they discussed moving out of the city while camping on a rooftop, but the conversation was interrupted by the arrival of X-23, who had left the group without explanation a year ago. Kiden encouraged her to stop self-harming and asked if she was prostituting herself again, though Laura assured her she was not. Laura's mind was suddenly invaded by the Gamesmaster. After breaking free, she ran away from them and was chased by Kiden, ultimately throwing herself off the top of a building to escape. Kiden attempted to slow time to find something soft for Laura to land on, but lost control and Laura fell on the pavement. After she regained consciousness, Kiden offered to let her live with the rest of them, but they were interrupted when Logan arrived on the scene to take Laura home. Kiden initially believed he was Laura's new pimp and refused to let her go with him, but Laura assured her he was a friend. Laura thanked her for her friendship and Kiden told her she would always have a home with their group before they parted ways.
Kiden's fate after this is unknown.