Poppy Playtime Chapter 4's "The Doctor" Explained

screenrant.com:

brings back familiar characters from previous chapters, such as Poppy, Kissy Missy, and Ollie, but it also introduces new characters, one of whom the player has heard about in-game prior to the latest chapter. In fact, Chapter 4 includes more characters that aren't enemies than any previous chapter, showing that the lower levels of Playtime Co. are their own world. However, the player isn't lucky enough to only meet allies in the depths of the factory.

Harley Sawyer is mentioned in the first three chapters of as the player finds VHS tapes and notes that reveal glimpses into the factory's cruel past. While he isn't one of the heads of the company, like Leith Pierre or Elliot Ludwig, Sawyer has undoubtedly shaped the company with his work. He made a name for himself among the employees and toys, but he ended up in a position that he didn't expect as the Doctor.

The Doctor is Chapter 4's main villain, butthe name is just a nickname for Harley Sawyer. Like Huggy Wuggy in Chapter 1, Mommy Long Legs in Chapter 2, and CatNap in Chapter 3, the Doctor is the villain who's behind the events that the player faces throughout Chapter 4. The nature of his existence lets him keep an eye on the player as they move through the prison and other areas that are hidden away under the Playcare, which helps build paranoia since he's quite literally always watching.

Before he was an employee, Harley Sawyer was part of Playtime Co.'s Young Geniuses Program. However, Elliot Ludwig removed him from the program after being unable to instill humanity in Sawyer and teach him to experiment for the sake of improving humanity instead of purely for progress.

Later, Sawyer was hired by Playtime Co. and would eventually be made the Head of Special Projects, which would be his most infamous position, as it put him in charge of the experiments that the company wanted to keep secret. That secrecy wasn't easy to maintain, and employees saw things they shouldn't.

Poppy Playtime has a lot of information