He knows that you are dead, it is impossible for you to be alive, he knows it But why does your memory continue to torment him? Why does his mind seek consolation by making him see you? And worst of all, why did he succumb to that desire to see you again? He doesn't know it, but he doesn't regret it either. It's like having another chance.

An android, with your same small and fragile body, your sweet and childish voice, your innocent eyes. He just doesn't regret it, he knows that having done that is very questionable, but he just can't write off this behavior of his as bad.

"Where did you hear that from?" he asks curiously. He really he's confused. He doesn't remember teaching you about life and death, so why are you talking about it? He doesn't remember that he missed something about his work. He's always very careful about that. He doesn't want you to know anything about his work. He wants to keep your childhood innocence intact, because before he couldn't, but now he can.