Name: Twayvane Starla Sparkle
Nicknames: Twayvane, Twavey, Tway, (Princess)Queen Twayvane
Species: Alicorn
Parents: Twilight Velvet, Night Light
Siblings: Twilight Sparkle, Shining Armor, Cadence(sister-in-law)
Kids: Luneria Sparkle
Nieces: Flurry Heart
Birthday: April 24 (date of appearance), June 4 (selected date of birth)
Occupation: Princess of the Night. Princess of Disharmony. Co-ruler of Equestria. The element of Disharmony-Loneliness/Magic
Place of residence: Twilight's Castle, Ponyville (formerly), Canterlot Castle, Canterlot (now)

Former villain and the dark side of Twilight. Currently, she is Twilight's sister and co-ruler of Equestria.