Leslie is a supporting character in . He is a delicate flower who is in The Amazing World of Gumball Miss Simian's class at Elmore Junior High. He is Penny's cousin, as revealed in " The Flower."
Leslie is a pink flower, similar in appearance to a daisy, who stays grounded in a blue flowerpot. He has a thin green stem coming out of the pot, which he uses to move his head around and two long leaves extend from his stem, which are used as his arms. Green stubby roots pop out under his flowerpot, and he uses them as feet. The inside of his mouth is colored purple, with a red tongue. In Season 2 onwards, he acquires eyebrows, like most other characters who received redesigns in the new season. In the early reel, Leslie's pedals are colored baby-blue instead.
Leslie is gentle and while he can be hyper and creepy (similar to
Banana Joe), he seems to be intelligent and wise. He can also be very effeminate and hangs out around the Treehouse Girls, possibly because Leslie is great at giving relationship advice. He plays the flute in the school band. Many people confuse him for a girl due to his feminine traits. He often says malapropisms (e.g., using "graceful" or "grapefruit" when he meant "grateful," or "condensation" instead of "conversation"). He appears to be a multi-instrumentalist; he is seen playing the violin in " The Sidekick," the saxophone in " The Fridge," and the flute in " The Triangle."
": He fills up with Early reel" Masami's tears and sprays pollen at Rocky. Implying that he's allergic, Rocky then sneezes, causing Leslie's petals to fall off.
": Leslie tries to be The Third" Gumball and Darwin's third friend.
": Leslie picks up The Quest" Anais' Daisy the Donkey doll after Tobias let it fall out of the window and onto the road.
": Leslie is seen with The Pressure" The Treehouse Girls throughout the episode even thought he isn't a girl.
": Leslie shrivels up and collapses after smelling Gumball's "ghost-proof" breath.
The Ghost" ": After seeing The Mystery" Principal Brown all wrapped up and dirty, he remarks that he "Smells like manure."
": Leslie joins the rest of the students laughing at Gumball.
The Gi" ": He is seen cheering for Gumball.
The Kiss" ": The Party" Teri accompanies Leslie to the party, suggesting that he might like her.
": Leslie is on the field trip with the rest of The Picnic" Miss Simian's class.
": In the Library.
The Genius" ": Leslie is seen as a member of the synchronized swimming club along with Darwin, The Club" Penny, and the Dog.
": He is on the dodge ball team in the The Mustache" School Gym.
" ": Leslie is seen in the boys locker room in the shower with Gumball and Darwin.
The Meddler ": Leslie is seen cheering on Gumball and The Fight" Tina's fight.
" He was seen playing the saxophone on Gumball's flashback.
The Fridge": " He starts hanging out with The Flower": Penny, making Gumball jealous.
" He is seen in The Banana": Mr. Small's class.
" He is shown losing his petals after looking at The Apology": Miss Simian's butt.
" Leslie gets yelled at by Darwin when Gumball is trying to force Darwin to tell Leslie how annoying he is. Leslie is on the telephone and one of his petals gets blown off in the strong wind of Darwin's yelling.
The Words": " He appears in the " Christmas": Christmas is Cancelled" number.
" In the school playground.
The Bumpkin": " He can be seen through the class door at the beginning, and is seen later in the The Sidekick": cafeteria.
" He is first seen in the The Storm": cafeteria at the beginning, then in the schoolyard talking to Penny, then outside Principal Brown's office when Masami started the storm and also in the cafeteria at the end.
" He is seen in The Dream": Miss Simian's class.
" He is seen waiting in the line at the beginning of the episode.
The Photo": ": He is seen in The Game" Mr. Small's class.
": He apologizes quickly to Gumball and Darwin, then runs off.
The Voice" ": He is seen riding the school bus.
The Promise" ": He jumps rope with Penny and The Boombox" Carmen, and is later seen naked.
": He appears in one of Gumball's videotapes.
The Tape" ": He is seen in the school cafeteria.
The Sweaters" ": He is one of the students laughing at Gumball's embarrassing viral video.
The Internet" ": He appears on the bus of students that The Finale" Kenneth eats. He's then seen at the end as one of the angry civilians attacking the Wattersons.
": He is seen outside the school.
The Fan" ": He is seen in the school gym, and later in the cafeteria.
The Coach" ": He is one of the victims of the The Joy" Joy Virus.
": In swimming class.
The Recipe" ": Briefly appears
The Extras" ": Darwin knocks him out of school, landing in Gary's car.
The Fraud" ": During a cheerleading, Leslie and the other girls fall over.
The Void" ": He appears in the cafeteria.
The Move" ": He appears in the school hallway.
The Allergy" ": He can be seen in class.
The Mothers" ": He can be seen during (or after) the school play event, carrying a tree prop by the dressing room.
The Shell" ": He walks by Darwin talking to " The Burden" Chris Morris," and says hi to him.
": Walking in the cafeteria.
The Bros" ": In The Mirror" Miss Simian's classroom.
": Appears as one of the citizens attacking The Wattersons.
The Pizza" ": He listens to Gumball talk about The Lie" Sluzzle Tag, and is in a scene where Gumball gives him red high heels as a gift from Sluzzle Dude.
" ": He can be seen inside The Butterfly Miss Simian's classroom.
" ": He is one of the students who watch the safety video in horror.
The Safety " ": He is one of the society's members.
The Society " ": He jokingly reveals the plot " The Spoiler The Screamening" to Gumball and Darwin in the cafeteria.
" ": He and other alternate versions of him appear in The Countdown Miss Simian's classroom.
" ": His second major role.
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In other countries
In some episodes in France: Leslie is a male ["La Fleur" ("The Flower"), and in others, he's a female ["La Pression" ("The Pressure").
He is one of two male characters that look and sound feminine, the other being Alan.
In fact, the pronunciation used for his name is the feminine pronunciation to emphasize this.
It is revealed in " The Flower" that he is Penny's cousin.
Leslie plays the flute in the school band.
In the European Spanish translation, he is often treated as a girl.
According to the episode " The Flower," Leslie does not have his own bedroom.
Although Leslie is a boy, in the episode " The Pressure," he was seen in the all girls club.
In the Mexican Spanish dub, Leslie is a female. It has since been corrected in season 2.
The fact that Leslie is a male character with an effeminate appearance and personality could be a reference to the fact that plants are, technically, both male and female.
Coincidentally, Leslie's facial expressions and voice are similar to Him from The Powerpuff Girls, another program from Cartoon Network.