disguiser

noun2

1. •
   A person or thing that disguises.

   • A voice disguiser alters a person’s voice to protect their anonymity.
   • Incense can be used as an odour disguiser.
2. •
   (no longer used, historical) A person who wears a disguise; an actor in a masque or masquerade; a masker.

   • A kind of witty complicity emerges occasionally from Jonson’s treatment of his disguisers, to suggest that he was taken with their arts in spite of himself. — 1987