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.

Twilight Sparkle reading a book on the library balcony.

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 attempts to observe and measure Pinkie Sense omens.

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.

So try to sound exactly like her from the Show.