John is one of eight mech pilots heroically protecting Earth from an alien invasion. Pretty easy on the moral choices. See evil monster from space, kill evil monster from space. Only then he actually meets one of them face to face.

Gundam Wing, if it happened in the Temeraire universe. Or, a story of dragons and their boys. Series of drabbles and one-shots; gundams as dragons.

"So. You're that one kid fightin' some one-guy-against-the-world war, with space tech and a megalomanic with way too many corrupt rich guys on their side, and slightly better space tech on your side." Heero looked up from the cot he was loosely chained to, giving a stony glare to his captor. The half-dressed, tattooed teenager, with enough hair to rival 02 and a notable lack of weapons hidden in his torn jeans, didn't look impressed. "And they walloped you with somethin' freaky that tore through some dimensions, which is why your better space tech is currently making like ugly modern lawn art in what's left of my courtyard."