take my advice
- have pen/paper at the ready, pay close attention at any details in the intro videos, everything can be a hint of course
- don't necessarily look at how they move on stage, which can also just be them acting into their masks's character
- and try to pay attention at their voices, if you can (i had been successful at that once, and that turned out also to be our winner
i recognized her from first performance where panellists were all guessing, puzzling)