Diana
Bred in the hive farms of the military creche, D’ana’s fate was decided even before she became a hatchling. From infancy, she was indoctrinated in methods of survival and fed nutrients designed to stimulate growth and deaden the emotional response centers. The purpose of the program was to breed professional soldiers, individuals who could kill and command. As D’ana grew to adulthood, she was educated in the sciences required for work on a spacecraft. She excelled, having decided that she wanted to someday command a mother ship on an invasion foray to a distant world.
D’ana and her coterie of agents had supported the Leader in his coup, never letting him know that his opponent lost via subtle subterfuge. The new Leader was pro-war, and work on an invasion fleet commenced at an accelerated pace along with intelligence-gathering on the human way of life and Fifth Column activities on Earth. Various samples of humans were secretly kidnapped and brought back for careful scanning and vivisection to develop artificial human skin that would disguise Sirian infiltrators. The Leader wanted to take the planet quickly and quietly so as not to expend any more of their planet’s dwindling resources than necessary.
D’ana, while having worked her way up to a position of authority, was still subject to the wishes and whims of one of the fleet commanders, a female who had not been part of the old creche program and to whom the military was a job that carried great social prestige. Diana hated her, and coveted the highest goal of her indoctrinated life. As the armada neared Earth, it was D’ana who suggested that it would further the bond of trust if they were to turn their alien names into closely-approximated human equivalents.
The contact and subterfuge went well, but D’ana (now Diana) did not reckon with the wiles of human nature, or that someone like Donovan, whose job it was to uncover truth where only suspicions lay, lurked among them. As reprisal, Diana had Donovan’s son kidnapped while other Visitor personnel tricked Donovan’s mother into supporting their efforts in return for favors. But Diana continued to clash with her own commander, and when the Resistance unleashed their bacterial weapon, Diana took the opportunity to slay her superior and assume the position for herself. Diana then also single-handedly murdered the fleet Supreme Commander, leaving only her in authority. But her power was short-lived, as she set the mother ship to self-destruct and then fled in a shuttlecraft, only to be later captured by the Resistance.
A year later, while being tried for crimes against humanity, she escaped through the nefarious machinations of Bates and his hired gun, Tyler. Diana knew Bates wanted her to reveal the secrets of the captured mother ship, and she intended to give him only trivial information until she was in a position to steal the powerful vessel back. But a Fifth Columnist stepped in to alter her plans, much to her advantage. Diana escaped and managed to reach a control center where she was able to contact the waiting fleet, which rescued her.
On board the mother ship, she renewed her war against humanity, resisting even the Leader’s final call for negotiations. But she went too far when she plotted to have the Leader assassinated and place the blame on human rebels. The plot was uncovered and she found herself under arrest and a prisoner of her own people.
Lydia
Hatched in the same military breeding bin which spawned Diana, Lydia grew up as the other’s rival in all things. When Diana displayed mercilessness and savageness early on and Lydia saw that her rival was rewarded for such behavior, she followed suit. Lydia was intent on proving she was just as ruthless, but her actions were merely an imitation of Diana’s very real psychosis. Lydia could be nasty when necessary, but she didn’t enjoy or revel in it.
Lydia joined the same political organizations as Diana, and when they were both posted to the Los Angeles mother ship Lydia could see their destinies following the same route and intertwining at last. After the initial assault on Earth was undermined by the Resistance, Lydia found her position growing stronger with each of Diana’s failures. But Lydia realized this presented herself as a threat to Diana. In a carefully-arranged escape in which it appeared Lydia was fleeing to the home world, Diana destroyed her shuttle, believing her to be killed.
However, Lydia actually did escape by other means, returning to the home world to report Diana’s power plays to the Leader. Lydia then returned to Earth with Charles, an interim commander appointed by the Leader. Diana was shocked to see Lydia alive, and even more unhappy to learn her authority had been restricted while Lydia’s was expanded.
Lydia fell in love with Charles, and became jealous when he schemed to remove Diana from power by marrying her — by law, it would force Diana to return home and raise a family. On the night of their wedding Lydia slipped poison into Diana’s nuptial drinking glass, but by a quirk of fate the bride and groom exchanged glasses and Charles was poisoned instead. Diana immediately arrested Lydia and was prepared to rid herself of her rival once and for all, when Phillip arrived and demanded that legal procedures be followed. Lydia and Diana would fight in hand-to-hand combat, but just as Lydia was gaining the upper hand, Phillip halted the procedures — he would not allow any more murders. Instead, Diana and Lydia conspired to shift the blame to a third party, who was found guilty and ejected into space along with the remains of Charles.
In numerous other incidents, the two officers have clashed and conspired against one another. Often these plots have either involved Phillip or he was forced to intervene. Diana and Lydia seem to have a mutual adversary in Phillip.