Mockingbird

Mockingbird, alias Barbara "Bobbi" Morse, was researching a way to recreate the Super Soldier Serum when she was recruited by S.H.I.E.L.D.. There, she trained to match her athleticism to her intelligence. Despite a lack of powers, her natural combat prowess has earned her a place on the Avenger's team.

Mockingbird was once married to fellow Avenger, Hawkeye.

Earth's Mightiest
Mockingbird defeated Firestar in the opening round, but tied with Bucky Barnes in the second, moving them both into the Last Chance Battle Royal, where they were defeated by Daken.