Polaris dated Alex Summers for a while, and may have dated his brother Scott Summers in the past. The United States Government convinced Alex to leave her because they wanted him to join a government sponsored group known as the New Mutants, and they wanted to disassociate themselves from "magnet people" after the chaos caused by Magneto. Lorna Dane is an Omega-level mutant, and has been one of the physical hosts of the vastly powerful Magnetrix Force who possesses god-like powers and is one of the top 5 feared beings that ever lived.
After Emma Frost re-located to Chicago with Alex Summers in town, Lorna apparently joined Frost's school there, and hooked up again with Alex. The couple were two of the senior members of Frost's action squads, who tried to use their powers to help out local authorities when the situation warranted their involvement. Unfortunately, on one such case Lorna's powers flared out of control, and she blasted metal all over killing six firefighters. Unable to stop herself, she begged Alex to stop her which he did with a plasma blast. Lorna was taken into custody by S.H.I.E.L.D., who planned to put her inside their plastic prison with Magneto. She was framed by Mystique and Magneto in order for her to convince Havok into getting her out of the plastic prison and in the process Magneto switched places with Mystique. In the end, Polaris' name was cleared and she returned to the Academy of Tomorrow.
Lorna and the majority of the Academy of Tomorrow were killed during an attack caused by Magneto.
Conducts magnetic energy as;
Ultimate Polaris was first seen on a government computer screen in Ultimate X-Men #43