Colin King is the man known as Codename: Ninjak. One of the United Kingdom's best intelligent operatives and the top espionage expert in the world. He is currently leading the team known as Unity, and is attempting to stop his arch-nemesis Dr. Silk. Although originally was the enforcer for the mysterious Weaponeer, in the new Valiant Comics relaunch he has been working for MI6 as an assassin for hire.