[@Jeyma]
I mean, he [i]is[/i] based off of Master Cheif and Space Marines. I don't really want to play up his super soldiery stuff, sure the armor is pretty tough but the components needed to repair it would be prohibitively expensive and something he'd have to make out of his own paycheck. I just described some of the things his status as a super soldier would give him instead of making everything vague as all heck.

Fun Fact: The whole "switching off parts of his brain to stay awake" thing is something bottlenose dolphins do.