The Bride: [on Pai Mei] Why did he accept me?
Bill: Because he's a very, very, very old man. And like all rotten bastards, when they get old, they become lonely. Not that that has any effect on their disposition. But they do learn the value of company.
The Bride: How did you find me?
Bill: I'm the man.
Bill: Was my reaction really that surprising?
The Bride: Yes, it was. Could you do what you did? Of course you could. But, I never thought you would or could do that to me.
Bill: I'm really sorry, Kiddo. But you thought wrong.
Bill: Pai Mei taught you the five point palm-exploding heart technique?
The Bride: Of course he did.
Bill: Why didn't you tell me?
The Bride: I don't know... because I'm a bad person.
Bill: No. You're not a bad person. You're a terrific person. You're my favorite person, but every once in a while, you can be a real cunt.
(Kill Bill Vol 2 Quotes)