Crypto-Wrestler

A Crypto-Wrestler (or Crypto for short), in the fictional 7 Worlds of Wrestling universe, is a professional wrestler whose true identity or nature is either unknown, questionable or shrouded in mystery. Little to nothing is known about their lives outside their exploits inside the ring, and so they carry with them an air of mystery. Crypto-wrestlers typically wear distinctive clothing that disguise their faces or bodies, especially face paint or masks.

Real Life
Examples of characters in professional wrestling who could be considered crypto-wrestlers include The Undertaker, The Ultimate Warrior, The Boogeyman, and El Generico.