In Twin Peaks, the one-armed supernatural spirit is named MIKE.
MIKE is one of the principal spirits connected to the series’ supernatural mythology. He appears in visions and lodge-related scenes and is associated with the entity known as BOB. The character’s name is often presented in capital letters, emphasizing his symbolic and otherworldly identity.
The same character also appears in a different form as Philip Michael Gerard, a one-armed shoe salesman played by Al Strobel. Gerard’s missing arm is linked to the spirit’s identity and to a tattoo connected with BOB. This dual presentation is one of the show’s deliberate mysteries.
Viewers sometimes answer “Philip Gerard,” but that is the human identity or manifestation used in the story. The canonical supernatural name is MIKE, while the character is also commonly called the One-Armed Man.