Do you want to compare Viper with Valentina de Fontaine? Discover the powers, weakness & weapons of Viper and Valentina de Fontaine from Viper Biography and Valentina de Fontaine Biography. Find out all about Viper and Valentina de Fontaine.# Check out how is Viper unique and distinct from Valentina de Fontaine. Discover their love interest, sidekicks, family tree and the movies and games list in which Viper and Valentina de Fontaine have appeared. Find out everything about them here!