The avenger, the persecutor, "one who suffers from divine vengeance." Literally, in ancient Greek, Alastor means "he who does not forget", and for Alastor Moody, this is fitting. For he will never forget — not the price they all paid, nor the man who was responsible for it all. Not the soldiers (for they were, after all, soldiers) who were lost, not the staggering bravery he witnessed, and certainly not the woman who saved him and destroyed him in one fell swoop. No, Alastor Moody would never forget, and that was just the way he wanted it.
Because, after all, without his memories, life trapped in a magical trunk would get dreadfully dull.
The Imperius Curse can only last so long before it begins to weaken, before the accursed can begin to fight it. And "fight" was Alastor Moody's middle name — or at least it should have been. He shifted uncomfortably, his thin, wretched robe leaving him chilled, his graying hair greasy and frizzled. Of course, being trapped in his own trunk meant there wasn't much for him to do; Moody knew how the trunk functioned, and he knew there was no way of getting out, Imperiused or not. Still, there was something maddening about being so utterly out of control, not only of his situation, but also of his mind and actions, Moody reflected, blinking and trying to ignore the strange feeling of an empty eye socket. The Imperius Curse could drive a man mad just as easily as the Cruciatus Curse, though few realized it. Moody had seen countless wizards scoff at the "least powerful" of the Unforgiveable Curses, and he had rolled his eyes (well, his eye), only to see the fools eat their words. Sure, the Imperius Curse didn't make a wizard howl with pain or kill them in an instant; but losing one's free will, after a certain period of time, was torture on a whole different level.
So Moody fought the curse, although it took him a full month of imprisonment to regain control of his thoughts. But once he had, his mind was able to travel back in time and remember back to Marlene McKinnon, the girl he'd loved and lost, and the battle that stole her away from him all those years ago. As long as he could remember Marlene, he could make it through. Because remembering Marlene meant that he knew what he was fighting for: Revenge.