Liza

Liza is the Darling family's maid in Peter Pan, or The Boy Who Wouldn't Grow Up. Unlike Nana, the children's nurse, Liza is not a dog, but an ordinary household maid, though apparently either very young or unusually short. In the stage directions, Barrie remarks that Liza "is so small that when she says she will never see ten again one can scarcely believe her". She is the only servant in the Darling household, but Mr. Darling has taken to referring to her as "the servants", something that Barrie metaphorically facepalms at in the book's narration. In an early draft of the play, her name was Helen.

Liza is the one that watches the children as they're sleeping, but fails to stop them from leaving the nursery with Peter Pan.

It's a bit part, and often forgotten. The program for the original production, in which the role was played by Ela Q. May, lists her last among the main cast (before the extras), describing her jokingly as "author of the play".