Originally Posted by jonathan7
If you cannot die, are invulnerable and unbeatable it is not possible to be heroic, brave or courageous.
But he's not immortal, invulnerable or unbeatable. He's an alien and hard to kill when compared to humans. And even if he was immortal, that doesn't mean he couldn't be heroic. The mere choice of actually helping people instead of ignoring them is heroic.