Long a victim of child abuse, Sally Blevins finally escaped her abusive stepfather when her mutant power first manifested itself and he threw her out of the house. She ended up a runaway, living on the streets until she joined the Morlocks, a group of homeless mutants. At one point, Skids encountered Rusty Collins, who was being pursued by the Freedom Force (government-chartered mutant enforcers composed of former members of the Brotherhood of Mutants) and a mob of mutant-hating humans. Rusty had accidentally injured a woman with his pyrokinetic powers and was wanted by the U.S Government. Skids’ force field allowed the two to easily escape, but they were eventually overtaken by the Freedom Force on the edge of Central Park.
Before the evil mutants could take them in, a mob of humans attacked the Freedom Force. In the confusion, Skids and Rusty escaped. She tried to get him to the safety of the Morlocks, but the Freedom Force caught up with them again, this time in the sewers beneath New York. Fortunately, the young mutants were saved by the timely arrival of the original X-Factor. After a brief skirmish, Freedom Force retreated.
Skids and Rusty began to learn more about their powers with X-Factor’s mentorship, becoming the first of several X-Factor “trainees” as well as developing a romantic relationship. They shared other adventures alongside the rest of the trainees, at one point calling themselves the X-Terminators. In this capacity, the team helped stop a demonic invasion of New York.
Eventually, X-Factor was disbanded and most of their trainees were inducted into the membership of the New Mutants. Rusty and Skids, however, learned instead that Freedom Force were taking mutant infants that were abducting during the demonic invasion into government custody. They tried to save the children but were imprisoned. The other New Mutants were unable to rescue their friends due to their concurrent adventures.
A mutant terrorist group, the Mutant Liberation Front, took notice of Rusty and Skids and freed them. In the process, they had a brief run-in with the Cable, who was also trying to rescue the couple at the same time. For reasons of their own, the couple voluntarily joined the Front and served with them for a brief time.
Rusty and Skids were kidnapped, however, by the Acolytes of Magneto when that team of self-styled mutant saviors attacked and decimated the ranks of the Front. The Acolytes took the couple to the orbiting space-station Avalon and inducted them into their group. Later, however, Holocaust attacked the Acolytes and destroyed their space station headquarters. Rusty Collins was killed and Skids was injured. Holocaust was stopped by the X-Men, and Skids was taken to the X-Men's mansion for medical attention. Upon recuperation, she left the mansion without being noticed.
Skids became a college student in Boulder, Colorado, studying biological sciences. She was eventually contacted by her friends of the New Mutants who had long since become X-Force, but they were soon all attacked by Reignfire and his incarnation of the Mutant Liberation Front. During the adventure, Skids’ force field disrupted the teleportation abilities of Locus, causing both of them to be caught in a trans-spatial backlash which deposited them in the Balkan country of Latveria. Skids and Locus were then captured by an age-old sorceress named Pandemonia, the self-styled Queen of Chaos, who sought to recruit mutants into her own personal army. With the assistance of the young sorceress Jennifer Kale, X-Force managed to defeat Pandemonia and rescue their friends, whereupon Skids returned to university life.
For a brief time, Skids was a member of the Los Angeles branch of the X-Corporation, and she was on hand to aid the X-Men against the threat of Elias Bogan. Following the events of House of M|M-Day, Skids was one of the many mutants who fled to the Xavier Institute and made a home in the refugee camp there. Recently Skids rejoined the Morlocks (secretly working for S.H.I.E.L.D.).