Harley Sawyer, known as the Doctor, is a central antagonist in Poppy Playtime, the episodic horror series by Mob Entertainment. Once a human scientist, he became an omnipresent digital presence inside the Playtime Co. factory. He took a leading role in Chapter 4, released in 2025, where his voice guides and taunts the player through the Safe Haven. Clips of his lines spread through gaming edits and soundboards because his polite, threatening delivery sums up the character in seconds and works even outside the game.