Madame Viper

Madame Viper, also known as Viper or Madame Hydra, is a villainess from Marvel comics and one of the leaders of the terrorist organization, HYDRA. She is an enemy of Captain America, Spider-Woman, and the Avengers.

Personality-wise Madame Viper is shown to be a completely remorseless, sadistic, sociopathic, and evil woman whose lust for power and conquest rivals that of fellow Hydra leaders Red Skull and Baron Strucker. She can and will cross any moral line in the pursuit of her goals, and became one of the most wanted criminals in the world when she horribly mutated 8,000 people in Symkaria, which earned her a death sentence from that country.

A classic nihilist, Madame Viper is also completely intolerant of failure, and every agent who has ever failed her has been executed without delay.

For all of her capacity for cruelty though Madame Viper is also driven, determined, cunning, and ambitious, and these traits mixed with her complete lack of redeeming qualities makes her a dangerous threat indeed.

The Wolverine (2013)
Main article: Madame Viper (The Wolverine)

Madame Viper is the secondary antagonist in the live-action film The Wolverine. She is portrayed by Russian actress Svetlana Khodchenkova.