Noob Saibot, once known in life as Bi-Han (璧漢), was a Lin Kuei assassin turned wraith from the Mortal Kombat fighting games series. He is one of the few original characters, debuting in the original Mortal Kombat arcade game as Sub-Zero, older brother of the current, younger Sub-Zero. He first appeared as Noob Saibot as a secret character in Mortal Kombat II, first becoming playable in Ultimate Mortal Kombat 3, and was a secret character in Mortal Kombat 4. He holds the unique distinction of appearing, in one form or another, as a fighter in all of the first seven main fighting games.