I'm the hero, but nobody understands. Dumbledore says I have to kill Voldemort, but the good guys don't kill the bad guys. Or so I've been told. No one else knows, he hasn't told them what I have to do yet. I haven't told them, I can't. No, I won't. What kind of a hero would I be if they knew?
Hermione might understand. She sees everything logically, but can she change her view when all her life she's been told of the good guys.
Ron won't understand. It's not in his nature. He sees everything as a full-blooded Gryffindor. Maybe it would have been better if I let the hat put me into Slytherin first year.
Everyone sees the world as black and white. The good guys put away the bad guys. Good always wins. But how can that be? If good never kills, but evil has no problem killing how can the side of light ever triumph.
But that's not how the world is. It's filled with shades of gray. To everyone, I'm their "White Knight", but to do what I have to do… I can't be like that anymore. Now more than ever I have to use my Slytherin side to do this. So in the end, when I leave to face him, Maybe they'll see the shades of gray, Maybe they'll see what I have become, Maybe they'll see the "Grey Solider".