Ariana Millikin was the only daughter of Mathias Millikin, diplomatic aide to the Organa family on Alderaan, and his wife Jenra, a medic. She wa the youngest of three children; her eldest brother, Bastian, attended the Naval Academy and was a gunnery officer on the Imperial Star Destroyer Intimidator when he was killed. Her other brother was Jase Millikin, whom she had thought was killed on Alderaan when it was destroyed.