| “ | "I did die when I was a couple hours old and didn't come back until I was two years old." | ” |
— Arabella to Ethan in Tomorrow War
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Arabella "Bella" Rebekah Mikaelson is a main character in Legacies and a former major recurring character in The Originals, before being promoted to a main character in the fifth season. Arabella is the tribrid daughter of Niklaus Mikaelson and Alexandria Salvatore, the younger triplet sister of Lucas and Parker Mikaelson, the older sister of Thea and Arrow Mikaelson, and the adoptive older sister of Asher Mikaelson. She is the granddaughter of Ansel, Esther Mikaelson, Giuseppe Salvatore, and Lillian Salvatore and the step-granddaughter of Mikael. She is the niece of Freya, Finn, Elijah, Kol, Rebekah, and Henrik Mikaelson as well asDamon and Stefan Salvatore and the grandniece of Dahlia. She is also a descendant of Silas and a distant relative of Cary. She is the adoptive younger sister of Marcel Gerard via her father.
Arabella is also the cousin of Freya and Mathias' unborn son; Damon and Elena's daughter, Stefanie Salvatore; and Freya and Keelin's son, Nik.
She was named Arabella by her mother. Her middle name is after her paternal aunt, Rebekah Mikaelson, and takes the surname of her father's side.
Arabella is a member of the Mikaelson Family, the Salvatore Family, and an unnamed family of werewolves. Arabella is by birthright, a member of the North East Atlantic Pack and an unnamed witch family. She is one of the five children fathered by the Original Hybrid.