G.I. Joe teaser.

I always liked Snake Eyes and to a lesser extent Storm Shadow, even if he was on Cobra's side for quite a long period of time and he mistakenly thought Snake Eyes had killed his martial arts teacher and master.

He came around though in the end however. Snake Eyes is hands down the best ninja/CIA spy/Joe their is. No Cobra warrior could beat him, or for that matter very few Joe's. He is that good and that deadly. Uncanny deadly too. I often wonder if their are types like him in the CIA even now or in the past, because if their are, I'd much rather not meet them in any fashion.