The great part is, those are the most dire insults either of them could think of.

Later…

Alucard: You called?
Integra: I have a question. What exactly did you tell that fangirl?
Alucard: It’s a secret.

Alucard: Don’t worry; it had nothing to do with you.
Integra: But what was it?
Alucard: Well, if I told you, it wouldn’t be a secret anymore, now would it?

Integra: Stubborn vampire.
Alucard: Nosy human.