Nick Fury says at one point "He (Loki) has already converted two of my best men" but in the beginning of the movie it clearly shows Loki converted a third guy. Who was that guy?
The fact he was present in the room indicates (to me at least) he had to be a pretty high ranking security officer, but he's never named at all. Yet he does support/guide Loki when they run from the room when the Tesseract goes ballistic. And the fact he survived that (touching Loki) also must mean he's pretty important. I'm guessing security again, figuring he'd be in charge of safeguarding the base while Hawkeye is after the stuff for Selvig. But that is just speculation.
Was he just taking up screen time so it showed Loki busy with converting while Nick attempts to get away with the Tesseract?