evil twin.

About evil twin

The evil twin is an antagonist found in many different genres of fiction. The twin is physically nearly identical to the protagonist, but with a radically inverted morality. In films, they may have a symbolic physical difference from the protagonist—such as a goatee, eyepatch, scar, distinctive clothing, or a more muscular build—which makes it easy for the audience to visually identify the two characters. Sometimes, however, the physical differences between the characters will be minimized, so as to confuse the audience. Both roles are almost always played by either the same actor or the actor's actual twin.