The Nod Hijacker is one of two infantry units that can hijack vehicles as of the Final War, the other being the legless form of the Cybernetic Commando.
The Hijacker is a quick, light infantry unit that can capture enemy vehicles in melee. She has less health and speed than the Cybernetic Commando, but is augmented with a variety of helpful abilities, including an aura that scrambles enemy weaponry and a powerful virus. When a hijacked vehicle is destroyed, the Hijacker pops out, ready to take over another target.
Several achievements can be earned if the player uses it to hijack several vehicles and the player uses it to infect several units.