I think Kirby is more amused by Lilith than anything. Which is probably a mistake, I think she’s much more dangerous than she appears. Then again, if you have Frankenstein’s Creature on your side, you might feel more relaxed in the face of danger. Of course, Kirby also seems quite pleased to see the Creature again. And even without knowing what it means, he seems to be warming to the whole “librarian” gig.