Diana (TOS)

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Introduced Battlestar Galactica: Starbuck 2
Death Killed on Thrace (Battlestar Galactica: Starbuck 4)
Parents Osiris†
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Family Tree View
Role Aide to Council Member Osiris
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Diana is a Cylon
Diana is a Final Five Cylon
Diana is a Human/Cylon Hybrid
Diana is an Original Series Cylon
Related Media
@ BW Media
Additional Information

Diana is the aide to Aeries Quorum of Twelve Council Member Osiris, as well as his daughter.

Around the early 7330s[1], Diana trained as a Warrior with a focus on weapons, flying, and in computer sciences (Battlestar Galactica: Starbuck 2, 3, 4).

Complicit with her father's plans with the Cylon, she arranges to cover up Osiris' treachery relating to the destruction of Umbra in 7322. Initially, they keep tabs on McKintosh, a former employee of Osiris's who claimed to have information on the attack. While she knew about the data chip and the corresponding pendant, they did not move against McKintosh.

It isn't until 7346 that the truth of Umbra became a threat, as Boomer utilizes the Aeries datanet to decode the chip Starbuck won from McKintosh in 7335. Ordered by Osiris to deal with it—and much to her father's chagrin later on—she commits an act of terrorism by blowing up the server room aboard Galactica and attempts to kill two warriors (Ensign Starbuck and Lieutenant Apollo) when they return to investigate the bombing. These failures segues into another attempt on wiping out both Warriors via a Cylon ambush, with information Diana provides the Cylons relating to their forthcoming patrol route.

That ambush a failure, Osiris instructs Diana to bring Starbuck to him at the Aerian Administration Hub for a chat. With the chat ending poorly, Diana was able to utilize the DNA left on Starbuck's glass and the half-smoked fumerello to stage her next plan: framing Starbuck for the murder of Kandi Trieste (Battlestar Galactica: Starbuck 2).

After planting both Trieste's body and the evidence aboard Erin Dream, she succeeds in having Starbuck arrested and brought to the Hub. However, after Starbuck's escape (aided by Lord Baltar and Apollo), she is tasked with following Athena after Adama's removal from the Council of the Twelve.

She succeeds in stopping Athena from uncovering the last remaining footage that would prove Starbuck's innocence, and (with the help of a Centurion) extricate her to Thrace in order to prevent the evidence acquired by Apollo and Starbuck from McKintosh's ship from making the light of day (Battlestar Galactica: Starbuck 3).

Despite Osiris's promise to release Athena following the destruction of the Umbra evidence, Diana plans to kill Athena and destroy the tylium mining outpost on Thrace by means of overloading the reactor. While the Cylons at the facility follow their task of removing the last of the tylium before the facility's destruction, Athena frees herself and engages in hand-to-hand combat with Diana, who vastly under-estimated her opponent.

Athena stops short of killing Diana by Apollo's intervention, they leave her behind. She vainly attempts to stop the overload, and her attempt to have Lucifer and the Cylons save her also fails.

Before Diana dies, she sends a final message to her father, telling him that she loves him (Battlestar Galactica: Starbuck 4).


  1. Starbuck was a cadet in 7331, and Diana told Starbuck that she was a year behind him (Battlestar Galactica: Starbuck 2).