Seras: The vampire attacked the parents, but didn’t kill them. Why?

Pip: Maybe it was full.

Seras: On one child? Not likely.

Pip: Maybe you scared it off.

Seras: We didn’t get there in time. If it had wanted to suck them dry, it could have.

Pip: So it didn’t want them.

Seras: It just wanted them out of the way…

Pip: …so it could get at the kid.

Seras: It’s some type of vampire that preys on children.