Powers: The ability to transfer inertia (momentum) from one object or person to another.
Bio: Edith Freiberg had the power to absorb and redirect kinetic energy (motion). After being recruited by Nighthawk to the team of super powered "Redeemers", she was one of the Redeemers who joined the Squadron Supreme's "Utopia Program" in hopes of stopping it. Inertia was then revealed to have joined the Squadron as a double agent. During her time in the Squadron, she developed a romantic relationship with Haywire. Alongside Nighthawk's Redeemers, she attacked the Squadron Supreme. During the fight, she battled Power Princess and was Doctor Spectrum.
Alongside the Squadron Supreme, Professor Imam, and Master Menace, Inertia attacked the Nth Man, a universe-absorbing entity that was encroaching into the Earth-712 universe. Inertia died in an attempt to use her powers against the Nth Man backfired and she was sucked through a breach in space and dissolved in a pink haze.