Juliana Tainer (2370)
Juliana Tainer was a Human scientist. Born Juliana O'Donnell, Tainer lived at the Federation colony on Omicron Theta. There, she met Dr. Noonien Soong, and the two fell in love. Her mother disapproved of their relationship, and they married in secret on Mavala IV.
O'Donnell assisted Soong in his work on artificial lifeforms, and helped create the android Data. When the Crystalline Entity attacked the colony in 2336, the Soongs fled the planet, leaving Data and his "brother", Lore, behind. The two made their way to the Terlina system; however, Juliana was seriously injured in the attack, and fell into a coma.
In a last attempt to preserve her memory, Soong built a new android, one indistinguishable from a human, and transferred his wife's memories into it, using a synaptic scanning technique. Following Juliana's death, Soong activated the android, who remained unaware of her new state of being. Soong deliberately designed the android to be so, and programmed her to shut down in the unlikely event of her android nature being discovered. She was also programmed to eventually deactivate and self-destruct her positronic matrix, essentially giving her an eventual "natural" death.
However, the relationship between the two soured, and Juliana left Soong and made her way to Atrea IV, where she met and married the Atrean scientist Pran Tainer, becoming his assistant. When the USS Enterprise-D arrived at Atrea IV in 2370 to assist in planetary core experiments, Data and Tainer were reunited, although Data was unaware of Tainer's contribution to his design, as his memories of those early days had been erased.
During the mission, Tainer was injured, and her true nature was discovered. After viewing a hologram of Soong designed to explain what had happened, Data chose not to reveal Tainer's true nature to her. (TNG: "Inheritance")
- It is unclear how exactly Dr. Soong managed to get the explanation for why Juliana left him into the holographic program he implanted into her positronic brain, since Juliana presumably left him after the program was created.
- Juliana Tainer was played by actress Fionnula Flanagan.