Are you saying that he has a rubber mask on his face? Because the face is what I'm talking about. The eyes shape, the cheekbones, the nose. Even the hand plays into this hypothesis. I don't need a costume to deduce that someone looks Mongol.

However, speaking of costumes: while ‘a wrinkled old hag as a villain witch’ says Baba Yaga, the long hat is not a feature of cultures in and around Russia, or in Asia in general to my knowledge. Neither old hags nor witches need such hats here.