[Klaus' observation is certainly correct. After all, the man has blatantly called out and taunted a demon on several occasions... Even if he didn't explicitly know the sort of creature he faced.

The compliment makes Blavat let out an airy laugh as he casually flops himself down into the soft sand beneath the crystal.]

Ah, you're such a flatterer~ You know, I'm sure you'd clean up quite well. [Is he telling Klaus in a roundabout way that he's a bit of a mess? Probably.] It's a shame that I highly doubt I'll find my preferred tailor anywhere nearby to help me design something for you.