Ms. Fanservice/Western Animation

Betty Boop was filling this role as early as 1930, providing an Older Than Television example.
The New Adventures of Flash Gordon: Princess Aura. In the early episodes, she was accompanied by seemingly every female on Mongo whose name wasn't Dale Arden. And sometimes Dale herself.
The three main characters of Totally Spies!, in what is also Parent Service
Before that came the female characters, particularly the villainesses, of Batman: The Animated Series. Catwoman, Harley Quinn and Poison Ivy all come to mind.
Six of Nine from Tripping the Rift.
Jessica Rabbit from Who Framed Roger Rabbit?.
Animaniacs has the famous Hello, Nurse! and Minerva Mink.
Bonkers has Fawn Deer.
Miss Information from Histeria!.
The Parody of Superhero tropes, Frisky Dingo, has Antagone, who has much larger breasts than her Lois Lane Alter Ego. Frisky Dingo also has Hooker, who's justified to dress this way, because she's... a Hooker.
Parodied in Aqua Teen Hunger Force: MC Pee Pants, who's reincarnated to look like an old man, says that he tried to be sexy in his poster to attract vampires. Of course, the character wears only a diaper anyway.
- One episode has Shake and Carl trying to score with a sexy construction worker named Dusty Gazongas. It's strongly implied that being sexy is mostly all she does.
Élisabeth "Sissi" Delmas is Ms. Fanservice in Code Lyoko. She's the one most often seen in some underwear, swimsuit or panty-shot scene. And yes, it's a kid show... but a French one.
- Yumi and Aelita have their moments too. May I present the radar page?
Sara Bellum in The Powerpuff Girls plays the trope straight and subverts it: Though only her impressive hourglass figure is ever seen and her face has never been shown, she is easily the most organized, thoughtful character in the series.
Princess Teegra from Fire and Ice definitely belongs with her costume being a small thong bikini.
- It's a natural since she was designed by Frank Frazetta... Frazetta specializes in fanservice.
Let's not forget the classics, with Red of Red Hot Riding Hood fame by Tex Avery. The Wolf was certainly "serviced" by each of her apparitions.
- She was intended to be Ms. Fanservice for World War Two troops at the time.
The title character of Aeon Flux runs around doing spywork and sabotage in outfits ranging from a skintight catsuit to a vinyl thong bikini and stripper boots. Aeon's appearance was originally conceived as a parody of unrealistically Stripperiffic Action Girls.
This trope is the one and only reason Cachorra was turned into an Expy of her own voice actress in Isidoro.
April O'Neil from the 1987 Teenage Mutant Ninja Turtles cartoon has quite the fanbase. She has a nice figure, large breasts and red hair, wears a sexy yellow jumpsuit, and often gets kidnapped and tied up. Even a Baleful Polymorph (she was turned into a Cat Girl in one episode and a Fish Girl in another) couldn't ruin her Fanservice nature.
- April's reputation as Ms. Fanserice is lampooned on Robot Chicken:

Male Reporter: What are you wearing??
April: Standard reporter-issue yellow jumpsuit.
Second Male Reporter: Dude, let her wear it!

In Total Drama Island, several of the female contestants qualify, but Lindsay and Heather stand out.
- Lindsay's got large breasts, wears a tank top and short skirt, and in one episode even dresses up like an admiral. And Wonder Woman!
- Heather has many Shower Scenes and appearances in a Modesty Towel during the first season.
- Izzy and Bridgette also have their fanservice moments: the former doing a seductive dance in "Not Quite Famous" and the latter Sitting Sexy on a Piano in "Aftermath: Bridgette Over Troubled Water".
Teen Titans: Raven and Starfire seem to be almost constantly tied for this position in the cartoon. In the comics, its a whole 'nother ballgame, as Starfire in the comics has what the original Terra described as a "balloon bod" that resembles a playboy model, and her outfit is best described as "bikini". They had to tone her down for prime-time children's viewing.
- Though one might wonder why the animators toned down Starfire below Raven, who was much less skanky and curvy than Starfire in the comics. In the toon, it's the other way round.
  - Raven's outfit is at least comparable to the comic, but then again, putting a girl as young as the cartoon's Starfire in her Stripperrific comic outfit would be almost criminal. For that reason, and for the fact that comic Starfire's personality is overwhelmingly uncaring of nudity and sex taboos, the writers decided to play up her comparative innocence. Given that the rest of the team include two veteran heroes, a half-demon and a recovering cripple, this makes more sense than in the comics where she was introduced, where Raven was the one who was comparatively innocent. This is subtly lampshaded in one episode where the two characters switch bodies.
The Legend of Zelda cartoon had... Fairy Companion Spryte. Only a few inches tall, she was as hot for Link as Link was for Zelda, once got an upskirt shot that revealed that she wasn't wearing underwear, took the chance to stare at him when he was naked in the bathtub, and one time even kissed him... when he was in frog form, to say nothing of making repeated passes at Link throughout the entire course of the series.
Vixen in Justice League Unlimited. She's also this in the comics.
- Not to mention the many other female superheroes in the league, such as Wonder Woman, Hawkgirl, Black Canary, Huntress and Supergirl. And we cannot forget some other villianesses as well. They include Harley Quinn, Cheetah, Galatea, Volcana and Star Sapphire.
In Ben 10, Gwen was a 10-year old girl and thus a Pettanko, and her teenage nemesis, Charmcaster, wore a coat that revealed no cleavage. In Alien Force and Ultimate Alien, however, the two are all grown up, with noticeably bigger breasts, Gwen having several scenes in swimsuits, and Charmcaster wearing a much form-fitting outfit.
Futurama's Turanga Leela and Amy Wong both take turns at fanservice from time to time; but very busty Hot Amazon Leela most qualifies for the title. Her standard outfit consists of skin-tight tanktop and pants, her other "ordinary" outfits (such as formal dresses and swimsuits) invariably have a midriff window showing her belly button, and she's the most likely to be seen wearing strange, Stripperific outfits. She's also the second-most-likely to get naked, after Professor Farnsworth.
Ty Lee from Avatar: The Last Airbender. And June, for the older crowd. This crowd includes Iroh. Too bad she was so underutilized... and as a result didn't meet up with Iroh again.
Dr. Girlfriend and Molotov Cocktease from The Venture Bros.
Princess Mandie from The Fairly OddParents. Even the Yugopotamians (aside from Mark) find her attractive!
- Yes, but they find her attractive because she's gonna kill them in the most gruesome and painful ways imaginable.
Vanessa from Phineas and Ferb arguably counts. At the very least she stands out compared to Candace and Stacy.
- Candace-2 in TheMovie.
Suzie Chan on The Amazing Chan and The Chan Clan, like her brother Henry, is a subtle version. Her outfit is designed to show off her long legs and she looks quite fetching in a bikini, but the animators don't go out of their way to play up her sexiness at every turn.
Drew Saturday. Let us count the ways shall we? A hot Action Mom, spends pretty much every scene in a spy catsuit, excluding that one scene when she sported a little black dress, has the whole white hair thing going on, and could easily kick your ass with her flaming sword. Need there be more?
She-Hulk in the Incredible Hulk cartoon. To start with, she's a green Hot Amazon. In the series, between the seductive voice, the orgasmic transformation, the constant Male Gaze shots, and averting the Panty Shot via Vapor Wear, she smashes the radar even more than she smashes villains.
- In her earlier appearances, She-Hulk was also portrayed as an Amazonian Beauty.
The Baroness was probably the most obvious example of this in G.I. Joe: A Real American Hero (there's a reason the lady has a trope named after her) and some of her outfits were pretty risqué for a cartoon of the time. Skintight "cat-suit" aside, the most blatant example was in "The Gamemaster", where she wore a bikini for the entire episode. Not by her choice. Plot-wise, she, Cobra Commander, Flint, and Lady Jay were kidnapped by a third-party villain and forced into a Deadly Game, and in her case, she was in a spa at the time when she was grabbed, and had no way to change. Still, it was obviously an intentional move by the writers. In one scene in said episode, Flint ends up grappling her in a struggle that ends with a pin; seriously.
- Lady Jaye has her moments too. "Skeletons in the Closet" is an obvious example, where she struts around in her negligee, fighting an evil Druidic cult with a golf club in a haunted castle. (No, really.)
Star Wars: The Clone Wars has had many female characters fitting this trope including Aayla Secura occasionally Padme, and Ahsoka also seems to be getting there, but so far the Fanservice incarnate of the show is definitely Suu Lawquane, by the sheer amount of Fanservice related tropes she embodies all at once.
Fifi LaFume from Tiny Toon Adventures. Good looks: check, sexy accent: check, Ensemble Darkhorse: check. Even the subtitles in one of her shorts call her "Sexius Skunkius".
- And Babs.
Kit from Martha Speaks.
The main protagonist of Word Girl.
- Also Leslie, Lady Redundant Woman, and Miss Power.
Rita Malone from Aardman's Flushed Away ought to count as a PG-version of this trope. During the movie she drops her pants at one point (revealing blue-striped granny-panties) and seems to enjoy shaking her butt as a taunt to pursuers. But then again, she is voiced by Kate Winslet...
Most of the female characters in Heavy Metal who are buxom ideals and are completely naked, especially the ones in the "Den" segment.
Disney has not shied away from female characters who were sexy for the era in which they appeared, but seems to have gone whole-hog since The Millennium Age of Animation started. A few examples:
- Tinkerbell from Peter Pan with her short skirt and exposed cleavage. According to some sources, her design was inspired by Marilyn Monroe.
- Megara from Hercules.
- Esmerelda's dance in The Hunchback of Notre Dame is a combo of this and Getting Crap Past the Radar. At one point she's pole dancing with a spear.
- Pocahontas is quite voluptuous and wears a rather revealing outfit.
- Princess Jasmine from Aladdin.
- Kida from Disney's Atlantis: The Lost Empire, who is a beautiful Atlantean princess with tanned skin, white hair, and Blue Eyes who wears a skimpy outfit comprised of nothing but a light blue bra, a single gold earring on her right ear, a gold armband on her left arm, a dark blue sarong with a single pink stripe with gold outlines and a light blue waistband and sash, and two gold anklets on her right leg. Who happens to be voiced by Cree Summer.
  - Even less so as a Queen at the end of the film, since she ended up wearing a long, flowing dress and a tiara.
Much like the Baroness, Evil-Lynn from He-Man and the Masters of the Universe was a waifu crush for anyone who grew up watching the cartoon in the 80s. Even more so the rare times she took the helmet off.

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