I'm 25 (born 1987). When I was young (must have been very young) I saw a show or movie that was an anime, but the kind that has a mature drawing style, smaller eyes, more serious, and the character that I remember had long blue hair, they were soldiers, but it was very futuristic, and they were hiding in a forest from these robots/mech things.
I also then remember a scene where they were sneaking into this quarry or something and the bad soldiers, had these bug heads (or helmets)
Does any one know? this is killing me!!!