A character who made his first appearence in Street Fighter 3: Third Strike. Q is a figure, wearing a trench coat, hat and a featureless face mask, who appears in various locations around the world during distasters. Nothing else is known about him.
In Street Fighter 2 a man appears on the boat on Ken's stage who bears a striking resemblence to Q, though this has not been confirmed.
The "Q" in biblical terms is the missing gospel in the Christian Bible that was believed to be burned down when the Great Library in Alexandria caught on fire.