Played by: Dafne Keen
Voiced by: Constanza García U. (Latin-American Spanish), Clara Quilichini (French)
Film Appearances: Logan
- "A man has to be what he is, Joey. Can't break the mold. There's no living with a killing. There's no going back. Right or wrong, it's a brand. A brand that sticks. Now you run on home to your mother, and tell her... everything's all right. There are no more guns in the valley."— Laura, quoting Shane
A young mutant girl born in the alternate future where mutants have all but died off. Said by Charles Xavier to be "very much like" Logan, she's the first new mutant either have encountered in at least twenty years. Pursued by Pierce and his Reavers, Laura may help provide the key to the survival of the vanishing mutant race.
- Action Girl: Considerably younger than most examples, but it doesn't stop her from being utterly terrifying in combat.
- Adaptation Dye-Job: Black haired and green-eyed in the comics, while Keen's eyes and hair are both brown. Although in X-23's original appearance, she really did have brown hair.
- Adaptational Modesty: In the comics Laura is usually (one of) the residential Ms. Fanservice(s) of whatever team she's on. She first appeared in NYX as a teen prostitute very much dressing the part, and her costumes frequently involve Bare Your Midriff. However Keen was cast deliberately with an eye towards avoiding the expected "20-something actress in a hot outfit," leading to a much more modest appearance appropriate for an 11 year-old girl in the film.
- Adaptation Name Change: Since X-23 in the films refers to a project consisting of several subjects as opposed to an individual cloning attempt, her serial number is X23-23 as opposed to just X-23. Furthermore, as Sarah Kinney was Adapted Out, there's no one to give her comics surname. The closest she's given to a last name in the film is "Howlett," when Logan introduces her as his daughter to the Munsons.
- Age Lift: In Target X she was around 13-15, and 15 when she first met Wolverine, but here she is 11.
- All Girls Like Ponies: Laura demonstrates a fascination with horses at several points in the film. She rides a coin-op pony at the convenience store right after the first fight with the Reavers, can be seen clutching a toy horse while she sleeps in the limo, and later in the film is drawn to the Munson family's herd. She also has a unicorn on the shirt she wears throughout the second half of the film.
- Armed Legs: As is her comics counterpart, she's "armed" with another claw in each foot.
- Ascended Fangirl: She read the X-Men comics in her spare time, and she ends up going on an adventure with the real Professor X and Wolverine.
- Attack! Attack! Attack!: Laura has two settings in combat: "kill everything that moves" and "tacti