The supernatural figure known as the Giant is called the Giant in Twin Peaks.
Played by Carel Struycken, the Giant appears to Dale Cooper in visions and other uncanny encounters. He delivers cryptic clues and presents information in a formal, otherworldly manner. In Twin Peaks: The Return, the related figure is identified as the Fireman, expanding the mythology associated with the character.
The Giant is connected to the strange spiritual forces operating around the Black Lodge, the White Lodge, and the town’s supernatural events. His messages are not ordinary police evidence, but they guide Cooper toward important revelations and suggest that the murder investigation has dimensions beyond the material world.
The Giant should not be confused with the Man from Another Place, played by Michael J. Anderson, or with the One-Armed Man, played by Al Strobel. Those figures have separate identities and roles in the mythology.