This guy has been appearing in Seras’ dreams since at least the first strip of 2006, so she knows him pretty well by now.
Baron: It is I, the spirit of your Harkonnen Cannon–
Seras: Yes, yes, I know. You say that every time I dream about you.
Baron: So what’s this I hear about you replacing me?
Seras: Sorry, Mr. Spirit…
…but can we do this later? I really need to talk to my Master.