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