Pinkie Pie is a happy earth pony with a pink body and a light pink mane & tail. Her cutie mark is three balloons (two blue ones and one yellow one). She loves planning big parties, and anything pink. She was also a natural leader in the Core 7 Serials, always ready to help her friends and share true friendship with them.
Rainbow Dash is a stylish Earth pony with a sky blue body and a pink, orange, yellow and green mane/navy blue, purple and pink tail. She has a rainbow between two clouds as her cutie mark. She is described as very mature and responsible, loves rainbows and speaks with a British accent, frequently adding the words "darling" and "dashing" to her sentences. In the Core 7 series, she has curly hair, and her mane was bound in a bun. She always dresses fashionably and is sometimes shown as a shopaholic.
She has three personalities. Her G3 personas are split up into the "An Oneesama with an eye for fashion who is womanly but still knows how to have fun" and "A bubbly, immature fashionista who loves to dress up".
In the G3 comics, she was very different from the show version, being much more adventurous. For example, she once challenged Sunny Daze to a sledge race (loser brushes the winner's hair every day for a week.) She ended up being thrown off after hitting a branch, rolling down a steep hill, and her fall is broken by slamming headfirst into a house. When everyone goes Oh, Crap and runs to her aid, they find she's quite happy - she definitely won the race. She tells Sunny Daze to get her brush. One comic's description of her reads "Rainbow Dash is the most outrageous pony you'll ever meet! When it comes to adventure, excitement, and fun, if Rainbow Dash hasn't done it, it's never been done!" Hmm, an adventurous and competitive Rainbow Dash? Sounds just crazy enough to work.
Scootaloo is the second youngest of the group, an earth pony with an orange body and a purple and pink mane & tail, also wears a ponytail. Her cutie mark is a butterfly with two small yellow flowers. Scootaloo is Cheerilee's younger sister who loves playing games and sports. She can be a bit stubborn and would sometimes argue with Cheerilee in some points.
Cheerilee is an Earth Pony, who was once a Unicorn in My Little Pony Crystal Princess: The Runaway Rainbow. In the early specials, she is a unicorn pony with a light purple body and a pink mane & tail. Her cutie mark is three pink flowers. As a filly, she wore a green bow on her head. She acts as Rarity's teacher and adviser. Alongside Brights Brightly, Whistle Wishes and Rarity, they were in charge on bringing in the first rainbow of the season until Rarity disappeared. Due to this, she, Brights Brightly and Whistle Wishes venture outside Unicornia to search for her.In the Core 7 series, she is an Earth Pony with a mulberry body and a mane & tail in different shades of pink and purple, stylized in pigtails (in the animation and in some of the merchandise). Her cutie mark is a light pink lily. She loves flowers and enjoys telling amazing stories. She is also Scootaloo's older sister who acts maturely and knows what's best for her, but sometimes argues with her.
Era-Specific Personality: In 2006 Hasbro made a unicorn pony named "Cheerilee", but when they created the Core 7 they scrapped her and made the current Cheerilee. Her new design is near identical◊ to Cherry Blossom. It seems all they did was redesign her slightly and slap "Cheerilee" on it. (This means she even has era-specific designs, going from a unicorn to Cherry Blossom Expy to her later pigtailed appearance as well as the shift that occured in the general pony body shape. Her personality stays the mostly same, though she does seem to get a bit younger. Though G3.5 Cheerilee is The Storyteller and so keeps her exposition duty, It's very hard to imagine the original Cheerilee sticking her tongue out at anypony.)
Expy: Her personality was passed onto G4 Cheerilee. As The Storyteller, The Smart Guy, a mentor to Rarity as a unicorn, and a big sister to Scootaloo as an Earth pony, casting her in the role of a teacher in FIM made perfect sense.
As mentioned Cheerilee is this to Cherry Blossom. Interestingly, we see Cheerilee 3.0 alongside Cherry Blossom in a crowd scene - only difference is the pigtails.
Girlish Pigtails: We also get an explanation for them (apparently she changed her hair in preparation for the Winter Wishes Festival.) We don't know just how she went from the apparent leader of Unicornia to a civilian earth pony in Ponyville to a younger civilian earth pony in in Ponyville.
Toola-Roola is an earth pony with a cream colored body and short, straight, dark pink, orange and yellow mane and light blue, navy blue and purple tail. Her cutie mark is a paintbrush and curly lines. She is a talented artist who enjoys painting pictures and making arts and crafts. She also loves finding inspirations everywhere, even in the unusual spots. Also, she is afraid of the dark and, thus, would not sleep at night without a nightlight.
Sweetie Belle is the youngest member of the Core 7, a unicorn pony with a white body whose mane & tail are colored pink, purple and light purple. Her cutie mark is a sparkly pink heart. She once hails from Unicornia, before being teleported to Ponyville when she was a baby. She has a big heart and likes to bake sweets for her friends. She also can demonstrate magic, however, this was only shown in "Once Upon a My Little Pony Time", where she used it to fix Rainbow Dash's scarf, among other random spells.
Expy: Her name extends to her G4 counterpart. Her personality's mostly the same, but as a later arrival (not existing before the Core 7 era) she's not quite as fleshed out as some. However, there's one big difference: G3 Sweetie Belle is a Supreme Chef but FIM Sweetie Belle is a Lethal Chef.
Informed Ability: In Once Upon a My Little Pony Time, Sweetie Belle can actually use magic. And that's when she was an infant! We never see it in the present. This despite her line in the Theme Tune Roll Call being "Sweetie Belle's magic brings a great big smile." (At that point in the opening, we see a spark of light from her horn, but we cut away before we see her actually do something with it.)
StarSong is a pegasus pony with a purple body and curly mane & tail in shades of pink. She also has gossamer-like wings on her back. Her cutie mark is a pink and white star. She is an expert performer, singer and dancer who is a bit shy at times, but blossoms on stage.
Character Tic: She likes to pirouette in the air, and otherwise puts the occasional dance move into her movements.
Idol Singer: Explained by Cheerilee that Starsong is the best performer in all of Ponyville. She's multi-talented: her toy marketing included not only ballet and singing props but keyboards, guitar, saxophone and trumpet.
Spell My Name with an "S": It's StarSong in most credits (that aren't in all caps) and in the title of the one web short to bear her name. Most fans spell it Starsong or Star Song, but apparently it's supposed to be in CamelCase.
Flitter Flutter is an Earth pony with a pearly yellow body and a purple and light pink mane and tail. Her cutie mark is a heart key with a ribbon in it. She is the Mayor of Ponyville and also the judge for the ornament making contest for the Winter Wishes Festival. She also entrusted Twinkle Wish to Cheerilee until the night of the Winter Wishes Festival. She usually rides a scooter.
Twinkle Wish is a wishing star, described in the legends of the Winter Wishes Festival. She usually sleeps inside a box to get enough energy for the festival so she can grant everyone's wishes. She was "kidnapped" by Whimsey, leaving the ponies to get her back before the night of the festival.
Whimsey Weatherbe is a female dragon with an orange body, yellow scales, brown hair, a pair of pink wings and wears a blue ribbon on her head, She lives in Willy Nelly Mountain at the outskirts of Ponyville and is shown to manipulate the weather and likes to have friends. She "Kidnaps" Twinkle Wish, the wishing star in Ponyville after Scootaloo accidentally opens its box, leading to the ponies to go to Willy Nelly Mountain to retrieve it from her. After the ponies failed to convince her, she decides to give it back with a changed heart at the night of the Festival.
Minty is an an earth pony with a mint green body and a pink mane and tail. Her cutie mark is three swirled mint candies. Minty is described to be a green machine, who likes anything green. She also loves collecting socks, standing on her head and playing cookie checkers with Sweetberry. She also shows a huge case of OCD and complete klutziness. Voiced by Tabitha St. Germain.
Spike is a 1000-2000 year old (he's not sure) blue dragon with orange scales and ties to royalty. Awakened during the events of The Princess Promenade, when Wysteria touched the flower he held in his tail and became Princess Wysteria. Spike now resides in the Celebration Castle in Ponyville. He is shown to be knowledgeable on things and gives the ponies some advice. He also has a habit of mixing up other fairy-tales with the story he's actually in.
Expy: Not really. There are dragons named Spike in G1 and G4 but he has a vastly different personality and even color scheme.
The Mentor: To Wysteria in The Princess Promenade.
Metaphorgotten: He often compares situations to a fairy tale (real-life one, inviting the usual Fridge Logic of how Earth fairytales reach a world that seems to have no humans) only to realize he's mistaken one fairy tale for another.
The Pig Pen: When he first appeared, he didn't even know what a bath was, let alone had one. He was actually proud of how long it took to smell as bad as he did. Though he didn't mind getting cleaned off.
The One Guy: He's the only male character in G3 aside from G3.5 background ponies.
Rarity is a unicorn pony with a pink body, yellow, orange and dark pink mane and green, blue and purple tail. Her cutie mark was a heart with multiple-colored swirls surrounding it. She is a young unicorn who usually values fun rather than her initial duty as a Rainbow Princess. She was being taught by Cheerilee on how to uphold her responsibilities. Also, she is in charge of one of the magic wand, alongside Brights Brightly, Cheerilee and Whistle Wishes. Her wand allows her to control the colors to bring in the first rainbow of the season and lets her summon the Crystal Carriage.
Catch Phrase: She gets two: "That was fun, let's do it again!" and "It's not my fault, it was X!"
Kimono is an Earth pony with a pinkish-purple body and a dark purple mane and tail. Her cutie mark is two yellow Japanese lanterns with flower designs. Kimono is the wise sage of Ponyville and also the keeper of all pony legends and lore. Known to be knowledgeable, she is often sought for advice by the ponies. Although she is born in Ponyville, she prefers to live in the outskirts of town.
Star Catcher is a Pegasus pony with a white body and a Blue, white and pink mane and tail. Her Cutie Mark is a Pink heart with glitter. Star Catcher resides in the secluded Butterfly Island during the events of Dancing in the Clouds until she met Skywishes. Described in Ponyville Legends to grant everyone's wish, Star Catcher loves to make friends with everyone she meets, especially to Skywishes.
Expy: While not a total copy-paste job, because of her colors, leadership role, wish-granting ability that proves she's got some serious magical power, and Voice of the Legion (of course, not the same volume as that of a certain princess of the night) she is often seen as the proto-Celestia (obviously, Luna got the voice.)
Pretty Butterflies: She commands a cloud of multicolored butterflies. At one point she uses them to carry Skywishes along with her to meet the other pegasi, and later to allow the whole main cast to "dance in the clouds" as per Skywishes' earlier wish.
Voice of the Legion: In her first appearance, she had a special effect-ed voice. Again, hers is much less deafening than a certain G4 princess that is more famous for it (in fact, her voice is more like a whisper with some amplification and echo.) She loses it by her second appearance.
Skywishes is an earth pony with a pink body and a pink and purple mane and tail. Her cutie mark is a Kite and a Butterfly. Skywishes is one of Twinkle Twirl's students, who wished to be a ballerina and usually attends Twinkle Twirl's Dance Studio. She is rather scatterbrained, but usually likes to make special wishes. She met Star Catcher, a Pegasus pony, after she discovered the Rainbow Waterfall and Butterfly Island, and was once the only pony who knew the secret of the Pegasus Ponies. Eventually, she and Star Catcher help the Pegasus Ponies to make friends with the residents of Ponyville.
Thistle Whistle is a pegasus pony with a blue body and a pink and yellow mane and tail. Her cutie mark is Purple Thistle flowers and a butterfly. Thistle Whistle is one of Star Catcher's close friends in Butterfly Island. Like her namesake, Thistle Whistle always whistles in one of her speeches.
Coconut Grove is a pegasus pony with a Pink body and a Dark purple and green mane and dark purple tail. Her Cutie mark is Coconut and flowers. Coconut Grove is one of the pegasus ponies in Butterfly Island and one of Star Catcher's close friends. She is very brave and is much more determined than the other Pegasus Ponies.
Sweetberry is an earth pony with a dark impale body and a Purple, green and white mane and tail. Her cutie mark is Two strawberries and a white flower. Sweetberry is the owner of the Sweetberry Sweet Shoppe and alongside Cotton Candy, works at the Cotton Candy Cafe. She likes to help each other out in and also likes to make several sweet treats for her friends. Sweetberry is sometimes busy but very reliable.
Cotton Candy is an earth pony with a pink body and a Blue, 'Fading Pink' and White mane and tail. Her cutie mark is a Cotton candy on a Stick. The owner of the Cotton Candy Cafe, in where she serves ice cream and sundaes to her friends. She is also a storyteller, enjoying conversation.
Sparkleworks is an earth pony with an orange body and a pink mane and tail. Her cutie Mark is a yellow, pink, blue and white fireworks. Sparkleworks is a Glitzy pony, who has a big imagination and can make each and every day an adventure. She is also found of glittery stuff and Razaroo explained that she coated Ponyville with glitter during her birthday.
Sunny Daze is an earth pony with a white body and a Yellow, pink, orange and purple mane and tail. Her cutie Mark is a Orange and pink smiling sun surrounded by purple clouds. Sunny Daze is a brave athletic pony, who usually loves outdoor activities and things with bright colors.
Wysteria is an Earth pony with a purple body and a purple, white and pink mane and tail. Her cutie mark is wisteria flowers. Wysteria is Ponyville's gardener and organizer of the Spring Promenade. She is shown to be a good gardener who loves flowers. She is also shy, but she finds a way to fill every activity with laughter and fun. After awakening Spike from his 1000-year sleep, she became The Princess of Ponyville.
Team Mom: Ponyville's spring parade comes close to getting derailed when Wysteria begins her princess training; everything is falling apart without her, and she is the only one capable of fixing things.
An Earth pony with a purple body and a blue, light pink and white mane and tail. Her cutie mark is a green and yellow parcel tied with pink and white ribbons. The main protagonist of A Charming Birthday, Razzaroo is Ponyville's resident party planner. She always plans everyone's birthday using her Birthday Book. In the special, she and her friends did a surprise party for Kimono.
All There in the Manual: In her toy description, it describes that she list of all the fun treats she wants for her party.
The Breezies are small insect-like ponies living in Breezie Blossom. Thought there are a lot of them, the most notable were Zipzee, Tiddly Wink and Tra-La-La. Zipzee has an allergy to pollen and flowers, ending up sneezing like crazy when she's near one. When together with, they decide together on where to go or what to do.
Self-Induced Allergic Reaction: Zipzee always sneezes when she's near flowers... but she loves sniffing flowers. The sneeze is always of such force as to comically propel her some distance backwards. Occasionally this has dropped her right where she needed to be.
An Earth pony with a white body and a yellow, orange, pink, blue and purple mane and tail. Her cutie mark is an orange, yellow and purple flower with three green leaves. Daffidazey is Ponyville's hair stylist, who runs the Twist n' Style Petal Parlor. She values cleanliness highly and can't usually see well unless she uses her glasses. She also has good styling skills and even fixed up Spike, despite being dirty and all messed up.
The Barber: She runs the Twist n' Style Petal Parlor.
A purple unicorn with pink and violet hair. Her cutie mark was a lily with sparkles. Princess of all that twinkles and glows, Lily has a very special secret— her horn glows!
Be Yourself: Lily doesn't want anyone to know that her horn glows; her story is about her learning that it's okay that she's different.
Everything's Better with Princesses: Another "princess" of a ceremony, like Rarity before her. Apparently that's just how Unicornia does things. Also presumably not actual royalty of any kind, as Cheerilee gives her her title when putting her in charge of the preparations. As the one who gives these titles and assigments, Cheerilee seems to be the one who actually runs Unicornia (or at least its important ceremonies.)
Storybelle is a pink earth pony with pink, purple, yellow, and blue hair. Her cutie mark is a windmill and book; when she spins it, it reveals what story she's going to tell. Acting as a librarian and storyteller, she lives in the Story Loft and has story club meetings every week. She also has a dragonfly friend, Gossamer, who helps her pick out stories to tell.
Broken Aesop: The oversize wings they end up with in what proves to be a dream prove more trouble than they're worth because they're uncontrollable. Obviously, the breezies and butterflies they observed don't have this problem. The idea that wanting to fly is a Bad Thing due to trying to be something you're not is very much not shown in the story. Especially since they're told "ponies don't fly" and we kinda know more than a few that do.
Hat of Flight: Turns out propellor caps do not work that way. Back to the drawing board.
Psychic Dreams for Everyone: They share the same dream with no sign of any magical anything; apparently it's because they're just that in sync.
Rhymes on a Dime: When one says something, the other always answers in rhyme. However, they're sometimes able to answer others in rhyme, too; as it's a storybook, it could be that they're just written that way. However, Storybelle's narration is not in rhyme.
Show Within a Show: Maybe. While their only appearance is in a story that Storybelle is reading, that story's background characters are all major characters from other episodes. It could be the book is about two ponies who actually lived (but aren't in Ponyville anymore, apparently.)