Sir Stew's friend and comrade, Sir Gallow, believes that Sir Stew has stolen important treasure from him and wants him murdered for it, along with fellow knights Sir Mash and Sir Boil, in the mission Loot Ninja. All three of the knights are innocent, as the culprit was actually the treasure chest itself.
As an in–game enemy, Sir Stew and the other two suspects are not much different from other standard knight enemies.