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Libby Folfax

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Libby Folfax

Gender Female

Relationship Sheen Estevez
Family Mr. Folfax, Mrs. Folfax
Friends Cindy Vortex], Brittany Tenelli, Jimmy Neutron, Sheen Estevez, Carl Wheezer, Goddard, Nick Dean
Enemies King Goobot V, Ooblar, Poultra, Professor Calamitous, Eustace Strych, Yoo-Yee, Meldar Prime
Likes Music, her friends and family, electronic gadgets, styling, advice, Sheen
Dislikes Cindy denying her crush on Jimmy, Sheen's nicknames
First Appearance Pain, Pain, Go Away!
Voice Actor Crystal Scales

Liberty Danielle "Libby" Folfax is a main character in the Jimmy Neutron franchise. She is Cindy's best friend, a member of Team Neutron and Sheen's female counterpart and girlfriend. She is voiced by Crystal Scales.


Libby Old S1

Libby's look in the movie and season one

During the film, shorts and the first season, Libby had a green dress with blue and orange patterned rectangles on it. She also had a streak of her hair covering her right eye along with her hair in a high bun. She also had green socks with black shoes. 

Libby in 2D

Libby's official 2D design (in her original form)

In "Beach Party Mummy," Libby had a new hairstyle with her hair in cornrow braids after gaining a makeover from Jimmy and her friends after Jimmy's Brain Blast to m

ake Libby look like Queen Hasabataslapya and put the mummies to sleep for 10 trillion more years.

Starting in A Beautiful Mine, Libby received new clothes. The clothes being a slight pink fading shirt, blue jeans, and brown shoes.

She also wore a swimsuit in "Jimmy on Ice" and "Beach Party Mummy."

She also wore a purple shirt, white pants, and white shoes in "Nightmare In Retroville" for her fashion model Halloween costume and while she was a werewolf.

She was seen in her underwear for the only time in "Patrick The Snowman." It is green, consists of 2 pieces, and appears to have a pink sound wave pattern on it.

She is eleven years old (twelve starting with "The Tomorrow Boys").


Not much is known about Libby's family, but she is known to have a father and mother. In "Beach Party Mummy," she discovers that she is related to Queen Hasabataslapya, and changes her hairstyle to the one her ancestor wore in her portrait.

In the shorts, movie and early episodes, Libby was more of a sidekick towards Cindy, but as the series progressed, she became more of her own character and evolved into Cindy's voice of reason.

Libby's main interest is music with a funky rhythm. When she experiences music withdrawal, she faints and goes crazy. She also loves electronic gadgets and being stylish. In the first season, she doesn't appear in the title logo. When she becomes more involved in the show, however, she is added to the logo in the third season. Unlike Jimmy's other best friends, Libby is shown to do well in school, and is even on the same level of Jimmy and Cindy in terms of intellect. According to "Nightmare in Retroville," Libby is a vegetarian.

Her favorite band is Graystar whom she has invited to Retroville twice (in "Attack of the Twonkies" and "The Tomorrow Boys"). She is also revealed to have piano playing skills (as revealed in "My Big Fat Spy Wedding" and "Vanishing Act").

Along with Cindy, Libby won a first place trophy for river stomp dancing at the school contest in "Battle of the Band;" Jimmy, Carl, and Sheen almost beat the girls with their electronic rock music guitars and drums, but at the last minute, Carl and Sheen destroyed their own instruments in a jealous quarrel, and the boys ended up with was an eighth place trophy after Carl did his giant snot bubble trick.

Libby has full knowledge about Jimmy and Cindy's relationship with each other, as Cindy does not want to express her feelings to Libby about it and stammers each time Libby mentions it. Although, Libby sometimes joins Cindy in teasing Jimmy. Libby once in a while returns Sheen's interest in herself, but not when Sheen is not annoying her with his overbearing mentions of Ultra Lord and occasional flirting.

In "The Tomorrow Boys", Libby had become the evil dictator of Retroville after Carl accidentally got the Megalomanium to her birthday party out of confusion by the perfume and the Megalomania. When she opened the present, she became mad with power, thus making her the evil dictator of Retroville.

In "The N-Men", Libby gains the super power of invisibility, based on how she was putting on vanishing cream for her acne when she and the group were exposed to the Van Patten Radiation Belt. Libby calls herself "Invisible Sister". She learned in the military station that she also had the ability to generate a force field, and create a pad to float herself in midair.

In The League of Villains, Jimmy, Carl, Sheen, Cindy and Libby's superpowered have been mixed up. Libby is the one who had ended up with Carl's superpower; Burp Boy. This made her gain the ability to make gigantic burps enough to make anyone go flying.


Cindy Vortex

Libby is probably Cindy's best friend in school. She is always seen being with Cindy, hanging out, having fun and going shopping. They even go to each other's home for playing.

But of course, despite this, Libby is straight-minded enough to know that even some of Cindy's own absurd antics warrant a snide remark or a slight hint of disappointment from Libby (making her a bit of a foil), especially since she later on is well-aware of Cindy and Jimmy's feelings towards each other.

In the shorts, the movie and season one, Libby was more of a sidekick to Cindy and didnt have much of a role in the franchise, but since Beach Party Mummy, she's become more of her own person and Cindy's voice of reason.

Sheen Estevez

Libby and Sheen weren't quite close friends at the beginning, however Libby has always encouraged and complimented Sheen when he came up with a good idea. For instance, in Beach Party Mummy, when Sheen distracted Principal Willoughby by telling him that new school tanning salon had been opened, Libby smiled and responded to Sheen's idea with "Great Thinking Sheen!" The two were even seen dancing alongside each other in the same episode. Their friendship eventually blossomed into a relationship during the episode of Love Potion 976/J, where Sheen was accidentally exposed to Jimmy's love potion and suddenly fell in love with Libby. From then on, Sheen has shown interest in her and is always looking after her, but it is hinted in previous episodes that he's always liked her. While Libby doesn't always approve of the nicknames which Sheen makes up, she returns his feelings and thinks he's cute and funny. 

Libby has always stood up for Sheen whenever everyone else has mocked him up. A good example is at a scene in the Yolkian dungeons in the movie.

In Crouching Jimmy, Hidden Sheen, she finally becomes Sheen's girlfriend. We also learn that Sheen actually cares about her more than Ultra Lord.

Britney Tenelli

Brittany often appears as a third member of Cindy's circle of friends, usually for singing, dancing or just for hanging out. One time, Brittany bribed Libby into being her science partner with a shiny new CD. While Libby and Brittany don't hang out as much as she and Cindy do, they're very good friends and get along well.

Jimmy Neutron

Libby plays the role of a big sister to Jimmy and is always trying to get him to come out of his shell. Jimmy likes Libby because she's calm and sensible.


In Crouching Jimmy, Hidden Sheen, Yoo-Yee thought Libby is Sheen's girlfriend, so he tried to kidnap her to urge Sheen coming to Shangri-Llama and fight him. He tried to be nice to Libby, and even give his sister's room to Libby, but she didn't like it because her CD collection was totally beat and hated the wallpaper. However, Libby did like Yoo-Yee's sister's jewelry.



  • Libby is one of two females in the franchise to burp, the other one is Judy
  • Libby is the second protagonist in the franchise to become evil. The first one was ironically Sheen. 
  • It is unknown why Sheen doesn't bring her up in Planet Sheen
  •  Libby's design in season 1 bears a huge resemblance to Keesha Franklin from the Magic School Bus
  • Libby's bad future counterpart looks more like her original design than her current one.
  • While Libby loves music, she calls Yoo-Yee's sister's CD collection totally beat.
  • Libby has a little brother (who's name has not been mentioned and looks was unseen in the series) seen in the beginning of "Make Room for Daddy-O" as the legs in the saw the lady in half trick.

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