After Viv seemingly died saving Earth and Counter-Earth, her father Vision began to work on a replica of her in his basement using an existing body he originally planned to use to restore his dead wife Virginia in order to assuage his grief over her loss. Wasp tried to talk him out of it, but Vision didn't listen. The moment Vision activated the second Vivian, the original miraculously returned after figuring out how to transport herself back to Earth. This led to an awkward moment when the two Vivians met.
Powers and Abilities
Seemingly those her sister Vivian possessed while she was still a synthezoid.