Zero is a character from Zero Escape: Nine Hours, Nine Persons, Nine Doors and the mastermind of the events that take place in the game. Zero is seen wearing a trench coat and gas mask and uses a voice changer to disguise his voice.
He is the creator of the Nonary games, where people put their lives on the line. He kidnapped nine people from their homes at exactly midnight using a gas grenade to knock them out. To make sure the nine people comply with his game he planted bombs in each person. Zero is very intelligent and very manipulative, but is quite welcoming to his guests as they attempt to solve a series of puzzles so they can escape with their lives.
"Consider this a privilege. You have been chosen. You are going to participate in a game. The Nonary Game. It is a game... where you will put your life on the line." - Zero