[Klara wonders if he's not good at picking out costumes considering how little effort a devil costume like that takes. She almost feels amusement, but it's somewhat submerged by the embarrassment she feels after their last conversation. She talked about things with him that she had only spoken to Eric about.
Her uncertainty does not show on her face, if anything she becomes more stoic, although she does give him a brief little curtsy in hello. It's what her costume calls for.]
Thank you. Yours is very...classic. [What else can you say about it?]