Miguel O'Hara

"It's...weird," Miguel said. "I've never had that happen at home, but I've been to enough similar worlds that I've seen people in one world, fought them, then had to help them in another. And there's no way of telling them why. I probably shouldn't tell them, because what would it do but make someone feel bad that probably doesn't deserve it? It's not like they can change what another version of them did."

He gave Zack a rueful smile. "And that's not remotely as personal as what you're going through."