Luster Dawn

Luster Dawn is a female unicorn who appears in the series finale, The Last Problem. She is depicted as Princess Twilight Sparkle's star pupil, much like Twilight was with Princess Celestia many moons ago.

Depiction in the series
In The Last Problem, Luster approaches her teacher, Princess Twilight Sparkle, at her castle in Canterlot with more interest in developing an independent study and less interest in making friends. The Princess then relates to Luster the story of her coronation went wrong many moons ago. At first, Luster interprets this as the reason why she should not make any friends, but after meeting the Council of Friendship, which is made up of the five other friends the Princess made so long ago, she changes her stance. Princess Twilight soon sends her away to Ponyville, the very place where she first met her friends. As the episode ends, Luster runs off into the sunset to play with her new friends, including some ponies, kirin, and griffons.

Personality
Luster is depicted as being rather studious and more interested in studying at first. She also has a habit of jumping to conclusions.