Twilight Sparkle is the main protagonist of the My Little Pony Friendship is Magic franchise.
The bearer of the Element of Magic. The protagonist of the series, a unicorn (who later becomes an alicorn) from Canterlot who serves as Princess Celestia's apprentice, and the eventual successor of Celestia and Luna. She's less than thrilled at first about the suggestion that she should try making friends but naturally winds up giving it a shot. She has a natural talent for Magic that goes far beyond what most unicorns are capable of. She's also very intelligent, levelheaded, and organized, making her a great unofficial leader for the Mane Six. However, her neuroses sometimes cause problems.
In the AWA fics, Twilight debuted on Chapter 9 of All Worlds Alliance Missions - Rainbow Rocks.
In her pony form, Twilight has a pale, light-gray mulberry coat with wings and a small horn on her forehead, with moderate violet eyes and a dark sapphire blue mane with moderate purple and brilliant raspberry streaks.
In her human form, Twilight has a pale, light-gray mulberry skin tone, she has moderate violet eyes and a dark sapphire blue waist-length hair with moderate purple and brilliant raspberry streaks. She wears a light-blue buttoned shirt with red ribbon tie, dark purple skirt, dark pink & purple socks and black shoes.
Twilight is first introduced in the series as being asocial. She politely refuses an invitation to Moon Dancer's get-together and later states that she and Spike "don't have time for that sort of thing." When Celestia tells her to oversee the arrangements of the Summer Sun Celebration in Ponyville and to try and make friends, Twilight is indifferent to the latter request. Over the course of the series premiere, however, Twilight comes to accept her new friendships and expresses a desire to stay with her new friends in Ponyville.
In Amending Fences, Twilight returns to Canterlot in an attempt to apologize to her former friends for her past actions. She succeeds with Twinkleshine, Lemon Hearts, and Minuette, but Moon Dancer coldly rebuffs the four mares. Minuette and Twilight liken Moon Dancer's behavior to the way Twilight used to act.
In Friendship is Magic, part 1, Twinkleshine says Twilight is more interested in books than friends. Even after Twilight becomes good friends with the rest of the main characters, she continues to read and consult books. For example, she confidently joins a marathon after reading several books about running in Fall Weather Friends. She is also very knowledgeable about Equestria's history, as seen in such episodes as Luna Eclipsed and Testing Testing 1, 2, 3. She almost passes out when she finds out that the Canterlot Library has a restricted section in My Little Pony Equestria Girls: Forgotten Friendship.
Twilight tries to be rational in unfamiliar situations. During the investigation in MMMystery on the Friendship Express, Twilight tells Pinkie Pie to stop making wild accusations, and they work together to find clues and solve the mystery.
However, Twilight can lose her cool under stress. In Swarm of the Century, she hysterically suggests building a replica of Ponyville in less than a minute before Princess Celestia can see the damage done by the parasprite infestation. In Lesson Zero, Twilight goes crazy in her attempt to write to Celestia about a friendship problem, to the point of deciding to create a problem herself. In The Crystal Empire - Part 1, she shows a desperate desire to pass a test that Celestia gives her.
Twilight tends to be skeptical of unproven claims, such as her friends' belief that Zecora is an evil enchantress in Bridle Gossip, and Pinkie's "Pinkie Sense" in Feeling Pinkie Keen.
In Party Pooped, Twilight displays an irrational fear of quesadillas.
In My Little Pony The Movie, Twilight rationalizes that outside of Equestria, not every problem can be solved with friendship, especially since a con artist cat almost sells them and they are almost ratted out by a band of parrot pirates. In the underwater kingdom of Seaquestria, she has Pinkie and the rest of her friends act friendly toward the friendless Princess Skystar to serve as a distraction while she attempts to steal the transformation pearl. It is this act that ends up costing the Mane Six's friendship and getting Twilight captured by Tempest Shadow.
Twilight Sparkle is exceptionally talented at magic. In a flashback in The Cutie Mark Chronicles, Princess Celestia tells Twilight that she has never seen a unicorn with so much raw ability.
- In Sonic Rainboom, she casts a spell that allows non-Pegasus ponies to walk on clouds, an ability that only Pegasus ponies naturally possess. She also casts a spell that gives Rarity butterfly-like wings made of “gossamer and morning dew."
- In The Best Night Ever, she transforms an apple into a carriage and mice into horses.
- In Lesson Zero, she uses a "Want it, need it" spell to make a raggedy old doll desired by anyone who lays eyes on it.
- In It's About Time, Twilight goes back in time to talk to her past self.
- In A Canterlot Wedding - Part 2, she shoots concussive blasts with her horn and uses a spell that reverts a changeling's disguise.
- In Too Many Pinkie Pies, she accidentally turns a bird and a frog into half-animal, half-orange hybrids while attempting to turn an apple into an orange. In the same episode, she uses her magic to return Pinkie Pie's duplicates to the mirror pool.
- In The Crystal Empire - Part 2, she replicates King Sombra’s dark magic to reveal hidden passageways in the Crystal Empire castle.
- She uses protective magic shields in The Return of Harmony Part 2, Ponyville Confidential, MMMystery on the Friendship Express, and The Cutie Map - Part 2
- Twilight first teleports herself in Friendship is Magic, part 2. In The Ticket Master, Twilight states that she didn't know her teleportation spell was going to happen after teleporting from an alley in Ponyville to inside the library. In Secret of My Excess, Twilight teleports Spike several times while trying to clean a lipstick mark off his cheek, and accidentally teleports Pinkie Pie from an unknown location to Golden Oak Library while teleporting Spike. In Dragon Quest, Twilight teleports herself and three other characters a considerable distance with great effort.
- In Magical Mystery Cure, she completes an unfinished spell by Star Swirl the Bearded with her knowledge of the magic of friendship, leading to her transformation into an Alicorn and a princess.
- In Castle Mane-ia, Twilight uses a spell to freeze the movement of her four terrified friends running around in a large throne room, without stopping their eyes or mouths from moving. The spell also keeps them aloft in their location, be it in mid-air or in the middle of a movement, effectively preventing their fall. She uses this spell again in The Hooffields and McColts on the titular families.
- In It Ain't Easy Being Breezies, Twilight uses a spell to turn herself and her friends into Breezies to help the Breezies get home.
- In Amending Fences, Twilight uses a spell to transform herself into a book illustration to try to talk to Moon Dancer.
- In The Hooffields and McColts, Twilight uses a spell to amplify her voice to get the attention of both the Hooffields and the McColts.
- In The Mane Attraction, Twilight uses her horn like a video recorder in order to bust Svengallop.
- In Celestial Advice, Twilight makes simulations of potential outcomes for Starlight.
- In A Royal Problem, Twilight uses a spell to talk to Starlight in Canterlot in the form of a music box ballerina. It is not revealed exactly how this spell was achieved, since Twilight told Starlight she was actually still in Ponyville.
As talented as Twilight is, her spells occasionally misfire or fail.
- When she casts a spell on the parasprites in Swarm of the Century so they won't eat food, they begin to consume items which aren't food, and subsequently destroy Ponyville.
- When she tries to assist with Winter Wrap Up by animating a plow with a "come-to-life" spell, she loses control of it and makes a mess.
- In The Return of Harmony Part 1, she tries to reverse Discord's strange effects with a "fail-safe spell," but it fails.
- In the episode Magic Duel, she has difficulty performing an age spell, which she says is only for "the highest level unicorns."
- In Make New Friends but Keep Discord, Twilight fails to stop the Smooze with her magic.
- In The Cutie Re-Mark - Part 1, Twilight tries to stop Starlight Glimmer from casting a time-travel spell, but the spell she casts bounces off.
- In The Cutie Re-Mark - Part 2, Twilight attempts to cast a spell in self-defense against the timberwolves, but it doesn't work.
In the first season, Twilight's horn usually glows white or the same hue as her coat, and the objects she is manipulating glow white, lavender, or pink. When she manipulates multiple objects at once, several other colors are used as well, for example in the gem-finding scene in A Dog and Pony Show. Starting with the second season's third episode, Twilight's magic is uniformly depicted using a pink glow.
- Everyone on the show so far seems to like, or at least not hate, her. Her friends and family all love her, and the Princesses all think she deserves to be an alicorn. Everyone she knows seems to be on at least friendly terms with her, and she has a lot of friends, even if you don't count the rest of the main cast. Even those who were once her enemies, such as Discord, Sunset and Starlight soon call her their friend, while Trixie says she "used to" hate Twilight (and still sometimes enjoys getting under her skin).
- Twilight's OCD, workaholic attitude, anxiety attacks, love for schedules and checklists as a way to structure her life, her poor social skills, and her tendency to not pay attention to what's going on around her when absorbed in something heavily imply that she might be the pony equivalent of a high-functioning autistic.
- Twilight is an expy of G1 Twilight.
- She is the most intelligent of the main cast and (often) shows a lot more common sense. However, her neurosis can be irritating to the others, she can be a bit smug and prideful if over-aware of her logic, and she's an apt Deadpan Snarker. Overall, she does a decent job of keeping these traits at tolerable levels.
- She's mostly referred to as "Twilight". Her closer friends tend to shorten her name to "Twi", and her brother calls her "Twily".