Undercover Viper: A face from Wolverine's past, Viper is part of Yashida's team of scientists, and helps implant the device which will negate Wolverine's healing factor. But her intentions are not as altruistic as they appear.

Black Clan Ninja: The Black Clan are a mystical sect of ninja who earn their income as paid assassins, and treasure power above all else. They will work for anyone, and perform any task, as long as the price is right.