The Nat Gadaw is the "bride of the spirits"... usually a man dressed like an old lady, often a transvestite, sometimes a real old lady in the most traditional festivals.
The Nat Gadaw is essential to Pwe festivals, she dances, sings and collects money to make the spirits talk to her, she then tells the people what the spirits say.
This can involve hours of dancing and drinking which sometimes ends with a drama and ethylic death for the unfortunate Nat Gadaw.