Knockout

Knockout is a female operative connected to the scientific criminal organization A.I.M., who clashed with Captain America alongside other dangerous adversaries including Bloodlust. Her exact background and abilities remain largely shrouded in mystery.

Bursting onto the scene in 1991 courtesy of Mark Gruenwald and Larry Alexander, Knockout is a Copper Age Marvel creation with ties to the notorious scientific syndicate A.I.M. — not the most wholesome company to keep. She's carved out a niche in the pages of Captain America, where she's shared adventures with the Star-Spangled Avenger himself and a rogues' gallery of fierce female characters including Bloodlust. With a legacy substantial enough to earn her a spot in the All-New Official Handbook of the Marvel Universe A to Z, Knockout may be a deep-cut discovery for most fans, but that's precisely the kind of hidden gem that makes Marvel's sprawling universe so endlessly rewarding to explore.