Eleanor is sweet, clever, confident, and self-assured. She is a gifted athlete, despite her larger physique. Eleanor is quite strong-willed and is far more likely than Jeanette to stand up to her sister Brittany when she feels that she is wrong.
Eleanor gets along great with Theodore of The Chipmunks. They are very open about their relationship and have many similarities. For example, they both love food (due to both being overweight) and are interested in cooking.
CGI Films
In the second film, Eleanor arrived, alongside Brittany and Jeanette, in front of the residence of former big-shot manager Ian Hawke. He agreed to manage them, as well as adopting them. Eleanor expressed the most interest in meeting the Chipmunks, especially Theodore, but was discouraged to do so by Ian with his lies. After enrolling in West Eastman, she finally got to meet him face-to-face, falling in love with Theodore. She continued to show eagerness in hanging out and getting to know him and the other Chipmunks, but her wishes were constantly being ruined by her manager. Ian was very cruel to her, making a rude comment about her weight and making her feel bad about her height. She and Jeanette were pushed further away from Brittany because Ian showed favoritism toward her. Though she was hurt by this, she held nothing against Brittany and decided to keep quiet in order to reach their dreams of becoming big.
In the live-action movies, she has a much softer and childish personality; she acts almost exactly like Theodore and seems extremely naive. In the CGI Films, Eleanor had a personality just like Theodore since she had a softish, childish, naive personality. Saying "Hi! I'm Eleanor!" in Chipwrecked just like Theodore says "Hi! I'm Theodore!"
CGI Series
Eleanor in the ALVINNN!!! and The Chipmunks series is much like the Eleanor of the 80s series, though itās taken to the next level. She lacks the insecurity about her weight as was portrayed in the CGI films and once again shows off her cooking abilities (Jeanette Enchanted), maternal instincts in treating the injured (What A Gem), athletic fitness (Family Spirit), and disdain for Brittany when she acts to dismiss Jeanette (My Sister the Weirdo). Despite being tomboyish she has shown several traits more commonly found in typical girls: she cries for sappy moments (Summer Camp), wears a skirt, has taken ballet lessons along with her sisters (Ballet Boys) and can be scared easily, even when she knows she was part of a scheme of scaring someone (Monster Madness). She is also seen to be a bit more hot-headed compared to her previous incarnations (Sherlock Chipmunk).
Appearance
In the Alvin and the Chipmunks series, she has blonde hair in pigtails and brown eyes. Her signature color is spring green. She usually wears a light green skirt with a white long-sleeved shirt underneath, with a striped tie, and knee-high socks with black Mary Jane shoes.
In The Chipmunk Adventure, Like Brittany and Jeanette, Eleanor wears a very-revealing green genie attire.
In Alvin and the Chipmunks Meet the Wolfman, At the play, Eleanor wears a fancy purple gown with matching hat, but in the wrap party, she wears a green, two-piece midriff dress, gold bracelets, a hot pink fanny pack with matching shoes and an ankle.
In the CGI films, Eleanor has green eyes. She also has yellow fur and ponytail pigtails. In Alvin and the Chipmunks: The Squeakquel, Eleanor wears a dark green sweater over a lime green dress and a silver sparkle dress.
In Alvin and the Chipmunks: Chipwrecked, she wears a green-and-white striped shirt with a green skirt with black dots, as well as a green sparkle dress and green-flowered garments.
In Alvin and the Chipmunks: The Road Chip, she wears a same striped shirt as she wore in the third film with a new, similar-looking skirt with dark green and lime green dots.
In ALVINNN!!! and The Chipmunks, Her outfit is consisted of a long sleeved seafoam shirt with dark green stripes. She has a spring green skirt and seafoam, lavender, and white sneakers with white laces. She has green eyes and blonde hair tied up in pigtails held with lime green ribbons tied up in bows. Her pajamas consist of a matching set of a long-sleeved shirt and pants that are green with candies on them.
Eleanor always stands up to Brittany when she tries to force Jeanette into certain things Jeanette doesnāt like, and always defends her when anyone says something negative. For example, refusing to help Brittany join a group that called Jeanette a 'nerd'.
Eleanor always stands up to Brittany when she tries to force Jeanette into certain things Jeanette doesnāt want to do and is generally the only person that tries to stand up to Brittany (besides Alvin). The two of them do share a very nice sisterly relationship.
Eleanor and Theodore are the most open about their relationship. They spend lots of time together and enjoy the others company. In Meet the Wolfman, Theodore gives Eleanor a necklace. They are shown to be married as adults in Big Dreams.
Eleanor and Simon are good friends, Simon been cooperated and cares more towards Eleanor is shown in the episode A Knight's Tail, which Simon helping her, while staying up awake all night for 'building an Armour' in leading the way for her, winning the knight's competition.
Abilities
Athleticism: She is very good at being athletic.
Culinary Arts: She is very good at cooking and baking.
Quotes
Eleanor: But we've never been scuba diving. And, and who knows what's down there? - (The Chipmunk Adventure)
Eleanor: We thought you were a goner! - (The Chipmunk Adventure)
Eleanor: Just a few more drop-offs and we're finished. - (The Chipmunk Adventure)
Eleanor: It's OK, little fella. I'm not gonna hurt you. Oh, you miss your mama and papa, huh? - (The Chipmunk Adventure)
Eleanor: Oh, uh, just some cold drinks and sandwiches. - (The Chipmunk Adventure)
Eleanor: Don't do it, Jeanette! - (The Chipmunk Adventure)
Eleanor: Just one little bite for auntie Eleanor. - (The Chipmunk Adventure)
Eleanor: He needs his mommy, Brittany. She'll know what to do. - (The Chipmunk Adventure)
Eleanor: I don't get it. Why are people willing to kill for these dolls? - (The Chipmunk Adventure)
Eleanor: You don't call him Barf Boy! Mister! Lost In Space...Camp:
Trivia
Eleanor's outfit for the 2015 TV series is similar to her outfit she wore throughout the first half of Chipwrecked.
Eleanor is the only main character chipmunk to not have her name in a title of an episode of any series to date.
She is the only one of the Chipettes that does not wear eye shadow in ALVINNN!!! series
She is the only one of The Chipettes that wears a skirt with legs exposed but with some panties or a bikini bottom in both the 80s (but white) and ALVINNN!!! series.
She is also the only Chipette to share the same signature color as her male counterpart, which is green.
Eleanor is never seen wearing her hair down just like Brittany and Jeanette.
She also plays the tambourine.
She is the only one who writes left handed of the two trios in ALVINNN!!!
she is short-tempered
she is the only one of the Chipettes that wears sneakers