Infiltraor is sword of Traveler-59. It can disguise itself as native species due to thier nano crystalline field and bipedal structure. Because of it's light weight, infiltrator's weapon is restricted to small plasma caster.
This is an awesome idea, it should replace the mastermind. Sure the mastermind is badass, but it has no offensive capabilities. Only mindcontrol. If It could shoot lasers like in the GDI finale on TWIII, then it would have been cooler.