A lonely girl raised by her single father Bartholomew and paternal grandmother, Angelica Jones discovered that she possessed mutant powers. After her grandmother's death by heart failure and her revelation that she was a mutant, her father sent Angelica to the Massachusetts Academy. The Hellfire Club's original White Queen Emma Frost began training Angelica in the use of her powers for the Hellfire Club's team of young mutants. She was never sent on field missions with the other Hellions, however, because of her lack of control over her lethal powers and because the White Queen wished to instill cruelty and callousness in Firestar's personality, and befriending other young mutants would work against that goal. The White Queen manipulated Angelica into perceiving Frost as a loving mother figure, unaware that Frost was secretly grooming her to be a potential assassin and bodyguard. Angelica did meet the New Mutants at an Academy dance and, with the White Queen's telepathic prompting, formed a crush on Cannonball.
Shortly after her resignation from the Massachusetts Academy, Firestar became a founding member of the New Warriors when she was invited (or rather blackmailed) by Night Thrasher into joining, and helped them battle Terrax. She also aided Night Thrasher against Midnight's Fire. She also helped Thor defeat the Juggernaut alongside the New Warriors. The team battled the Mad Thinker and Primus, and then battled Psionex.
Marvel: Ultimate Alliance 2: Story
Firestar was not among the New Warriors who died in the catastrophe that sparked the events of Civil War. She was presumed to be among the Warriors who confronted the operator of an anti-Warriors hate site created in the wake of the catastrophe, revealed to be former Warriors member Carlton LaFroyge (Hindsight Lad). She is seen flying in the background, above the confrontation.
Firestar has responded to the Superhuman Registration Act by effectively retiring from her career as a costumed hero. She was seen as part of a New Warriors reunion of sorts with Nova and Justice, with whom she seems to be on good terms again. She also began attending college
She would later come outta retirement to aid Captain America's Secret Avengers in extraction. She is then trapped inside Prison 42 but is freed by the Heroes. She would later be controlled by The Fold.