Colin Baker (in-universe)
From Tardis Wiki, the free Doctor Who reference
In another reality, the Warrior was a fictional character voiced by an actor named Colin.
Biography
Colin, in character as the Warrior, was giving a monologue about his existence, when the director working with Colin stopped the scene, deciding that the scene needed to be redone for safety. Colin then does the second take. (AUDIO:The Key to Key to Time)
Behind the Scenes
Colin is a fictional version of his actor Colin Baker, who voices the Sixth Doctor and the Warrior. He is uncredited in the boxset.