A brilliant strategist and tactician with extensive combat tactical experience, Viper is highly skilled in the management of criminal organizations and very well connected in the international criminal underworld. She is also a master of stealth and espionage. Perhaps her greatest strengths are her influence, the financial resources at her disposal due to her stature in organized crime, and an uncanny luck which has allowed her to cheat death in situations where lesser people would have died. Viper may or may not have supernaturally augmented longevity. Viper is usually armed with various ray pistols and conventional handguns. She has also used various other special weaponry, including poison-tipped throwing darts, knives, and whips. She has sharpened and elongated canine teeth with hollows inside them. She keeps a special poison in them, to which she has an immunity. For a brief time, Chthon replaced her right eye with a black orb capable of projecting persons into a magical dimension. In the "Age of Apocalypse" reality, Viper was married to the Silver Samurai. She and her husband fought their way from the islands of Japan through hordes of Apocalypse's Infinites. Viper was killed saving Samurai's life, leading to the Silver Samurai accepting Magneto's offer to join the X-Men. One of the alternate dimensions that is visited in "Exiles" #91-95 has been overtaken by a version of Madame Hydra. This world (Earth 1720) was dominated by Madame Hydra (actually Susan Storm Richards), her lover Wolverine, and their top assassin Slaymaster. However, before the Exiles can exact retribution, Madame Hydra and her lackeys escape into the omniverse to seek out other worlds to conquer. The "Ultimate Marvel" version of Viper appears in "Ultimatum: Spider-Man Requiem" along with Hydra. She attacks Tony Stark's offices in order to retrieve the Iron Man armor but is subdued by Iron Man, with the help of Spider-Man, and taken into custody by S.H.I.E.L.D.