Who is the secondary antagonist in The Wolverine?

The secondary antagonist in "The Wolverine" (2013) is Viper, played by Svetlana Khodchenkova.

While the main antagonist is the Silver Samurai, Viper plays a significant role as a powerful and manipulative force who aids him and poses a threat to Wolverine. She is a skilled martial artist and a skilled manipulator, adding to the film's complexity.