James Buchanan Barnes had suffered unimaginable trauma at the hands of Hydra. After saving Steve Rogers from drowning, he ran. What the Winter Soldier didn't quite expect, was to come across a twelve year old girl who had a similar experience with Hydra organization. Eleven unintentionally became Bucky Barnes' savior...
When Bucky Barnes was 'K.I.A', he left a daughter behind. A beautiful 16 year old girl. Irina was 5'9, tan skin, eyes as blue as the evening sky, and hair golden like a wheat field. However, the HYDRA agents that survived, kidnapped her. They tortured her, and turned her into: The Arctic Assassin
Everest was once used as a testing experiment for Hydra. She was called энергия meaning energy due to the blue energy she released. They were working on super soldier from the moment some babies were born much like Everest's situation. I don't own the MCU characters or MCU plot but I own Everest and her plot.