| Character Information
She is a tree with yellow bark (skin), and turquoise leaves (hair). She also wears a turquoise dress, and a very large pair of red rounded spectacles. As an elderly character, she has wrinkles along her face. In Season 2, the marks in her face, except her forehead, are removed and wears a blue dress.
- "The End": She walks by the school bus before it drives off, and is also seen for a split second standing in line at Food N' Stuff.
- "The Laziest": She is seen standing in line at the supermarket again. This time, Larry accidentally yells at her, resulting in her leaves falling off.
- "The Mystery": She has a very small cameo in this episode. She shushes Tina after she says "ouch" when the bookcases fell down on her.
- "The Gi": She is seen looking at Richard in a flashback as the cottontail cavalier.
- "The Genius": She checks out a book on botany for Leslie.
- "The Curse": She is seen inside an airplane.
- "The Helmet": She is one of the people giving Nicole a job interview.
- "The Flakers": She's in the library.
- "The Virus": She walks in the library.
- "The Castle": She is one of the guests at the Wattersons' house, and has her first actual speaking role.
- "The Plan": She is seen at Elmore Park.
- "The Name": She is in the shopping line.
- "The Extras": Her first major role. She sings "Just Notice Us."
- "The Gripes": She helps Gumball and Darwin raise money.
- "The Move" She's in the library, shushing Gumball, Darwin, and Clayton.
- "The Law": She appears waiting for ice cream, she later appears driving her car during the Doughnut Sheriff's driving rampage.
- "The Mothers": She walks through Elmore Mall.
- "The Password": She's driving her car on Elmore Expressway, barely dodging the Wattersons' cars.
- "The Butterfly": She appears in an airplane and then at the mall.
- "The Saint": She gets mad at Alan for being noisy, and destroying a computer in the library (although he was just taking the blame for Gumball and Darwin).
- "The Oracle": She is one the many people who want to be the 1,000,000th costumer.
- "The Society": She is a part of the secret society.
- "The Spoiler": She is in the cinema.
- "The Countdown": She appears in the bus that Gumball and Darwin take.
- "The Wicked": She is in the mall running from Mrs. Robinson driving the Wattersons' car.
- "The Traitor": She is in the cinema.
- "The Girlfriend": She is part of Jamie's apology note.
- "The Disaster": She is seen at the mall.
- "The Choices": She is a referee at the tournament.
- "The Stars": She is in the cinema.
- "The Heist": She is seen in her car.
—The Librarian on numerous occasions
Gumball: [Sighs] I just wanna s--
—From "The Castle"
"Who did THIS?!"
—The Librarian in "The Saint"
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- She is seen working as a librarian and speaks of this job in "The Castle," but in "The Helmet," she is shown interviewing Nicole for a promotion at the Rainbow Factory.
- Despite her elderly appearance, she is probably actually around the same age as Richard and Nicole, as she is seen going to school with them in a flashback from "The Gi."
- However, she already looked like she could be an adult, so she might actually had already been working at the school and thus be older than she appears.