Awesome Music: They may be tough, badass robbers, but man, can they sing. Then again, when you're outcasts from society sitting around in a castle, music and theater is pretty much the only entertainment you've got. This was shown prominently in the movie, with musicians being cast instead of actors for many roles. Songs can be found here.
The Fair Folk almost kidnapping Ronia. In the movie, they start making eerie sounds as the mist drags in, whispering "come", and Ronia starts walking in a trance, mumbling "I'm coming..." all the while.