This page documents the major differences in The Promised Neverland’s story and characters between its original manga and live-action film adaptation.
- Rossi, Eugene, Dalia, and all of the two-year-olds are absent from the film.
- Sherry is among the children who escape from Grace Field House Plant 3 in the film adaptation.
- Isabella's secret room does not appear in the film.
- Don and Gilda are not lied to about the house's secret by Emma, Ray, and Norman and instead are immediately told the truth.
- Krone tells the kids about the "Promise".
- Nat, Anna, Lannion, and Thoma do not listen to Emma and Norman's conversation with Krone and thus are not told the secret before the five-year-olds.
- The Transmitter-crippling device is hidden in Phil's Pig Pillow, which is an object that does not appear in the manga.
- Don, Gilda, and Ray accompany Emma and Norman when visiting Krone in her room.
- Ray and Isabella's backstories are not shown completely.
- In the film, the maximum age to be shipped out of Grace Field is changed from twelve to sixteen.
- Emma, Ray, and Norman are aged up to fifteen.
- After escaping, the children immediately head to Shelter B06-32.
- Carol is aged up and already resides at Grace Field House Plant 3 at the beginning of the story.
- The Grace Field House library is significantly smaller than it was in the manga.
- Norman meeting Peter Ratri is shown immediately after he is shipped out and their meeting takes place in the hallway inside the gate as opposed to in an office off to the side. However, Peter asking Norman to assist him is his "research" does not occur.
- Peter Ratri tells Norman about the Ratri Clan and his brother.
- Isabella tells the children about Leslie while on the wall.
- Krone has a doll in the film (and in the anime), but not in the manga.
- Several characters have different hair, eye, and skin colors than their manga and anime counterparts.
- Minerva's Owl only appears as a blue hologram projected by the Promised Pen which leads the escapees out of Grace Field and through the Demon Forest.
- Unlike in the manga, Isabella is blamed for the children's escape and is strongly implied to have been killed for it.
- The flashback of Norman getting sick and Emma making a Cup Phone to communicate with him is not shown. However, it is implied to have happened since Norman packs the Cup Phone in his luggage.
- In the manga, all of the questions on the Grace Field test are multiple choice, but in the live action film, the tests are a combination of multiple choice and write your own answer.
- The old well at Grace Field House does not exist in the film. So the children hide the supplies for the escape under a white sheet behind a tree in the forest instead.
- Isabella does not find Emma's severed ear in the film, making it unknown as to whether Emma cut off her whole ear or just cut the transmitter out like Ray did.
- Isabella's Lullaby is a different tune in the film.
- Unlike in the manga and anime, Isabella is strongly implied to have been killed in the live action film as punishment for letting the children escape. In an original scene at the end of the film, Isabella admits to Sarah and Peter Ratri that it was her fault the children escaped. Afterwards, a demon grabs Isabella and holds a Vida to her chest strongly suggesting she was killed. However, the scene ends before the Vida penetrates her skin, leaving her fate technically unknown.
- The film opens with a brief original scene of Isabella meeting baby Emma for the first time.