A cheerful character wears (or is) pink to signify their cheerfulness and optimism.
A cheerful character can be a Genki Girl, a Cloudcuckoolander, The Pollyanna, The Pink Heroine, a Cheerful Child, a Cherry Blossom Girl, a Perky Female Minion or any kind of cheerful character. If they have pink hair, they're the Sub-Trope, Rose-Haired Sweetie.
This is technically done mostly by women, but it also can be done by guys (often a very perky gay guy).
Rule of Symbolism can sometimes apply, unless the character consciously chooses pink a lot.
Also, when Princesses Prefer Pink, their personalities are more than likely to be sweet and happy.
Compare Pink Means Feminine.
- In the Pretty Cure franchise, the pink protagonist of each series is almost always a Genki Girl.
- Futari wa Pretty Cure and Futari Wa Pretty Cure MaX Heart: Although Cure Black's theme color is, well, ...black, her secondary color is pink and is cheerful and energetic.
- Futari wa Pretty Cure Splash★Star: Cure Bloom/Bright begins the trend of having the heroine of the show decked out in pink, with a primarily magenta uniform, and is cheerful and energetic.
- Yes! Pretty Cure 5 and Yes! Pretty Cure 5 GoGo: Cure Dream manages to top Cure Bloom by having pink hair as well as a pink uniform and being a Genki Girl.
- Fresh Pretty Cure!: Cure Peach manages to top Cure Dream by having a name that alludes to the color pink (Momozono/Peach), two shades of pink in her uniform, and even pink eyes and is a Genki Girl.
- Inverted in Heart Catch Pretty Cure: While Cure Blossom has a pink scheme color, along with pink hair, she's more of a Shrinking Violet instead. The blue Cure, Cure Marine, is the one who's an outgoing Genki Girl.
- Suite Pretty Cure ♪: Cure Melody has a pink uniform and pink hair (in Cure form), and has the cheerful attitude to match.
- Smile Pretty Cure!: Cure Happy manages to top all the previous heroines by having pink hair and eyes both transformed and untransformed (although it's a much darker pink untransformed), and has the cheerful and energetic attitude to match.
- DokiDoki! PreCure: Cure Heart is the first Cure to get less pink when she transforms, with her pink hair turning blonde (although she keeps her pink eyes), but is still a Genki Girl.
- Happiness Charge Pretty Cure: Cure Lovely's uniform is comparatively less pink than previous Cures, though it's still her theme color. Her hair and eyes are also pink and she is cheerful and energetic.
- Go! Princess Pretty Cure: Cure Flora has a pink outfit, gets pink streaks in her hair when she transforms, and is a Genki Girl.
- Maho Girls PreCure: Cure Miracle's outfit is bright pink (except the skirt, which is a lighter shade of pink), she wears a pink bow in her hair, and her hairband has a small pink witch hat. She's also a Genki Girl.
- Kirakira★PreCure a la Mode: Cure Whip has pink eyes, her white Cure outfit has a dark pink frill accent, a pink bodice, a hot pink bow on her left hip, pink boots and a magenta choker, and she's a Genki Girl.
- Hugtto! Pretty Cure: Cure Yell has pink eyes and hair in both civilian and Cure form (although her hair is darker as a civilian), her outfit is pink, and she's a Genki Girl - as well as being extremely cheerful, she's also the Cure of high spirits/energy, quite literally the "Cure of Genki".
- Downplayed in Star★Twinkle Pretty Cure - Cure Star has hot pink hair and pink eyes in both civilian and Cure forms, and her outfit is pink, but she's more imaginative and curious than she is energetic.
- Downplayed again in Healin' Good♡Pretty Cure - Cure Grace has a pink outfit, pink eyes and pink hair, but she's less energetic than other lead Cures due to being an Ill Girl.
- The titular character from Puella Magi Madoka Magica has pink hair and eyes and wears a predominantly pink Magical Girl outfit. Her cheerful optimism and kindness is her strongest defining character trait.
- The main character of Ojamajo Doremi is a Genki Girl who retains an entirely pink color scheme, even though her outfit undergoes several changes as the show progresses.
- Yuna from Yuki Yuna is a Hero is a Red-Headed Hero. Her magical girl appearance has pink hair and an equally pink attire. Yuna is the most energetic and optimistic of the Heroes.
- Mermaid Melody Pichi Pichi Pitch: Main character Lucia's tail as a mermaid is pink, and her idol form outfit consists of a pink dress, pink gloves, and pink boots.
- Chibiusa/Rini from Sailor Moon is a pink haired Cheerful Child, nicknamed "The Pink Spore" by her detractors. Her pinkness gets dialed Up to 11 when she gets her full Senshi powers. Her fuku is mostly pink and her attack is even "Pink Sugar Heart Attack".
- Mina Ashido from My Hero Academia. She has pink skin as a side effect of her Quirk and pink hair and she's one of the most cheerful and upbeat students in her class. Her hero name is even "Pinky".
- Gravitation. Male example: Shindou Shuichi has pink hair and is the poster child for Keet.
- Lyrical Nanoha:
- Caro is normally happy, if a little shy. She has pink hair, magic and clothing.
- Downplayed by the ever cheerful Nanoha who, while closely associated with the color pink (as it's the color of her magic), almost always wears white.
- Symbolically speaking, Fate exchanging her black hair ribbons for Nanoha's pink ones at the end of the first season marked the point where her outlook on life started to improve.
- Averted by Signum who wears pink and has pink hair but is The Stoic.
- Ichigo from Sore ga Seiyuu! is always wearing pink and is incredibly upbeat. Then again, with a Stage Name that translates to "Cute Smile Strawberry", what did you expect?
- Yuki from School-Live! is the perky member of the club and has bubblegum pink hair. She's also a Cloudcuckoolander.
- In The Incredibles, Violet Parr favors clothes in purple and other dark colors, fitting her rather dour personality. After she gains more self-confidence (thanks to superhero-ing), she switches to wearing a pink shirt.
- In Beauty and the Beast, Belle starts to think of Beast more kindly during the "Something There" number, and she is wearing a pink dress.
- In The Little Mermaid, after Ariel gets her legs, she's given a pink Pimped-Out Dress in a scene, where she can barely contain her excitement at being in the human world (although this continues even when she's in her blue dress).
- Unikitty from The LEGO Movie is not only a pink kitty with a unicorn's horn, but she's also the Princess of Cloudcuckooland.
- Plucky Girl Rapunzel from Tangled spends the film in her pink night-gown. Concept art shows she originally had a green dress however it was changed to pink likely to invoke either this trope or Pink Means Feminine.
- Sleeping Beauty's Princess Aurora spends most of the film with her dress coloured blue - and whenever she's wearing the dress, she's sad that she won't get to see Philip again. In the subsequent Disney Princess merchandise (including spin-off stories), she is wearing the dress in pink when she's reunited with her parents and therefore much happier.
- Famously in The Breakfast Club when Alison lets Claire give her a makeover. She switches from black and dark colours to pink.
- Carrie (1976) sees Carrie donning a pale pink evening gown for her high school prom - which starts out as the happiest evening of her life. This adaptation set the tone, as her dress was red in the book, but all other incarnations have her wearing pink too.
- Harry Potter and the Goblet of Fire - Hermione goes to the Yule Ball (the first date she's ever been asked out on) wearing a pink dress. She has worn pink before, but it has more of an effect here. The dress robes she wore in the book were blue, but the costume designer noted pink looked nicer on Emma Watson.
- Downplayed in The Sound of Music. In contrast to the more abrasive or aloof older siblings, second-youngest Marta establishes herself as a Cheerful Child by excitedly saying she wants a pink parasol for her birthday. Maria - who is the Magical Nanny there to liven up their lives - agrees and says pink is her favourite colour too.
- 13 Going on 30: Jenna slowly undergoes a HeelFace Turn as she gets back in touch with her childhood self. This is accompanied by her being seen is soft pink outfits more often.
- Arche from Tales of Phantasia is a perky 17 year old witch who dresses in pink and has pink hair to boot.
- Amy Rose from the Sonic the Hedgehog series is a pink hedgehog and is always cheerful and excited, especially whenever she's with the titular character whom she's in love with, much to his dismay.
- Kirby: Kirby is an adorable pink blob that is cheerful and has a mentality of an active toddler.
- Happiny evolves into Chansey after leveling up with an Oval Stone, which evolves into Blissey when leveled up with high friendship. All three forms are pink and their names hint at their cheerful and friendly nature.
- Cherrim's Sunshine form has pink petals and by nature is very energetic.
- Harvest Moon has several character with pink hair and pink attire who display this trope:
- Nina from Harvest Moon and Harvest Moon: Magical Melody is the local florist's daughter. She is by far the most cheerful bachelorette, to almost childish extents.
- Popuri from Harvest Moon 64 and Harvest Moon: Back to Nature is Nina's granddaughter and inherited her hair color. She's even more upbeat, something that has been exaggerated over time to the point where she is a Womanchild come Harvest Moon DS.
- Lyla from Harvest Moon: Save The Homeland is an expy of Popuri's mother Lillia. She is more downplayed in her cheerful nature but is stated to usually be sweet. It's noted in the manual though that just because she is smiling doesn't mean she is happy.
- Zelda from The Legend of Zelda very often wears a pink dress. Due to being different individuals her personality is never completely stationary however she is usually at minimum a Nice Girl and is optimistic.
- Princess Peach of Super Mario Bros. fame almost always wears pink. She's the sweet and cheerful (though not as much as Daisy) ruler of the Mushroom Kingdom.
- Dizzy, the most upbeat and peppy playable character in Iggle Pop!, is an Iggle with bright pink fur.
- Claris Sinclair from NiGHTS into Dreams... wears a pink outfit (probably intended to be a school uniform) and is shown to be a happy, bubbly teenage girl in official art. Her hair is even pink.
- In Ensemble Stars!, Tori is associated with pink - he wears a pink jumper under his uniform, sometimes has pink accents on his idol costumes, and has pink hair. However, this bubbly cuteness is a deliberate affectation to make himself seem cuter. But while he's not as sweet as he first appears, he's still quite childish and enthusiastic.
- Avatar: The Last Airbender brings us Genki Girl Ty-Lee:
Ty-Lee: My aura has never been pinker!
- My Little Pony:
- My Little Pony has over two-hundred pink ponies, but Pinkie Pie is the most famous example of this trope. Pinkie from My Little Pony (G3) is cheerful and nice, though not to the degree of her G4 counterpart (who is actually an expy of the white-and-yellow coloured Surprise from G1). She was upgraded to The Leader during the "Core 7" retool.
- Pinkie Pie in My Little Pony: Friendship Is Magic is a party-loving Cloudcuckoolander, and, fitting her name, has curly pink mane and pink pelt.
- Princess Cadence of the same season quite literally has powers over love, and was Twilight's favourite foal sitter years ago. She's essentially a surrogate Cool Big Sis and frequent source of care and affection for Twilight.
- Among the Care Bears is a pink bear called Cheer Bear.
- Deedee from Dexter's Laboratory is a much cheerier person than her brother Dexter and wears a pink tutu as her default outfit.
- Molly from Bubble Guppies has pink hair. She is optimistic and nice.
- Aelita from Code Lyoko has pink hair and wears pink clothes. While not nearly as cheerful as Odd she is often upbeat.
- Starfire's normally red hair is pink in Teen Titans Go!. She is usually the most optimistic and cheerful of the team.
- Steven Universe: Rose's son Steven didn't inherit his mother's pink hair color, but instead inherited her love for pink. His shirt is pink and his powers are, too. He's also a Cheerful Child.
- Whether intentional or not, Kimber has pinkish red hair in Jem. She's by far the most friendly major character. She keeps her hair color in Jem and the Holograms, where she is even more energetic and overdramatic.