"X... Just hang in there, buddy. I'll get you back to base... just hang in there..." - Zero
Looks like what he's saying as he's waiting for a ship to come to them or something. ^^
Like what someone else had mentioned, I find X and Zero's relationship to be brotherly. Zero's like that older brother who helps the younger brother get steered in the right direction so he can complete the goal.
I am glad there are other people who understand the concept of them just being friends.... actually, almost like brothers.
I really love how this drawing came out. It is not all that refined, but that totally works for this piece. I also like how neither of there faces are actually showing, yet the emotion of what is happening comes across so well.
I had the thought.... I have always seen X as the kind of that character that, though he is their greatest hero and one of the strongest, often winds up like a little brother to others. Even those who would not be considered fighters develop an inate sense to protect him, though by all rights, he is the one capable of protecting others.
This picture also does a very good job of depicting X in that light; on the side you don't often see him on.