The Brood WarEdit
Selendis was a student of Artanis. In the reorganization following the Great War, she was promoted to executor, acting as Artanis' assistant and commanding the combined military forces of the protoss.
Shortly after the Fall of Aiur and the successful defense and activation of the xel'naga temple of Shakuras, she took part in a mission to rescue three heroes from Aiur. However, the mission was interrupted by Ulrezaj, who slew two of the three heroes before being captured along with three of his followers. She also became aware of the Shel'na Kryhas (protoss survivors) stranded on Aiur, but didn't believe it was possible to save them. She, Zeratul and Artanis agreed to keep their presence secret. She would later oversee Ulrezaj's defeat over Shakuras. She would later express eagerness bring the battle to the zerg and reclaim Aiur.
In 2503, Selendis was confronted with a dilemma when the warp gate of Shakuras activated, and from it emerged several former Tal'darim (protoss survivors from Aiur, split off from the Shel'na Kryhas, addicted to the drug Sundrop) and a terran, Rosemary Dahl. They claimed to have escaped from Ulrezaj, a powerful dark archon terrorist who had committed a number of crimes against the protoss. The Tal'darim were taken away to be purged from their addictions, but Dahl was imprisoned. Selendis met Dahl there. Dahl tried to convince her of her mission – rescue Jake Ramsey, who carried within him Zamara, a preserver, but Selendis was unwilling to believe Dahl, since terrans were considered untrustworthy (especially female terrans, such as Sarah Kerrigan) and her mind could have been influenced by Sundrop.
After the stories could be verified, Selendis began to treat Dahl with more respect, such as not reading her mind without permission. She even championed Dahl's cause to the Hierarchy, believing she could persuade her former instructor, Artanis, to her side. They convinced Artanis, partly through Selendis' manipulation of the leaders' egos, and Selendis nominated herself to lead the mission in order to hunt down Ulrezaj for his crimes against the protoss such as the slaughter of preservers. The leader of the Nerazim, Mohandar, revealed that he knew where Zamara would likely go – the Dark Templar sanctuary moon of Ehlna. Selendis convinced him to reveal the location, and allow her to lead forces there.
Ramsey and Zamara had arrived at the Alys'aril first; Selendis arrived with Mohandar, Vartanil and a small number of protoss. As Ramsey underwent an "operation" to remove Zamara, the zerg under the command of Ethan Stewart appeared, and Selendis found she could not enter the Khala there and so could not call for reinforcements. Stewart demanded an audience.
Selendis told him of the operation, convincing him not to interfere. However, he insisted on sending a single hydralisk to view it, in case he was being tricked. Dahl and Vartanil began fixing an old ship while the alysaar began moving memory crystals to the ship, in order to ensure the knowledge made it safely to Shakuras; meanwhile, another ship would seek reinforcements.
Conditions changed when Ulrezaj appeared on the battlefield, having recharged his energy. The zerg attacked Ulrezaj but also sent zerglings into the temple. Selendis killed many quickly, but could not stop them all. A Terran Dominion force under the command of Valerian Mengsk then appeared; it severely injured Stewart. As Dahl moved forward to finish him off, Selendis severed Stewart's head, in order to protect Dahl from her own vengeance. Dahl was not happy with this.
Selendis disappeared before the Dominion could claim the site, but later a fleet of protoss ships appeared, driving the Dominion away.
The protoss continued to be wary of zerg encroachment. They found it on Haven, a world near protoss space, when it was settled by terran refugees from Agria. The refugees had traveled from a refugee staging point at Meinhoff after an outbreak of a zerg infestation virus. While the outbreak was contained by Raynor's Raiders, some of the colonists remained infected and the virus broke out again. The infestation was detected and Selendis led a fleet to purify Haven.
Before the purification could begin, Raynor's Raiders arrived to investigate the colony's condition on the behest of Doctor Ariel Hanson. Selendis cordially greeted Commander Jim Raynor and informed him of her intentions. Hanson wanted additional time to work on a cure for the virus.
- If Raynor decided to side with colonist(src)
Raynor held out in hope, that a cure could be found in time and refused to allow the protoss to purify the planet. Selendis ordered her fleet to attack but was repulsed by the Raiders. As she withdrew, Selendis hoped the terrans' would be vindicated and thought no less of Raynor.
- If Raynor decides to side with the protoss(src)
Raynor agreed with Selendis that the situation was far too dire to wait for a cure. In the protoss' stead, he ordered the Raiders to purge the colony.
Children of the VoidEdit
Legacy of the VoidEdit
The Reclamation of AiurEdit
Selendis was present with the Golden Armada when the Protectorate launched its attempted reclamation of Aiur. As the Templar prepared to warp down to the planet's surface en emasse, Zeratul appeared on the bridge of the ship she and Artanis were on. Selendis ordered the Templar to arrest the "traitor," but Artanis held them at bay, willing to hear Zeratul out. The Nerazim claimed that Amon had returned, and that the invasion had to be called off so that the protoss could deal with the larger threat he posed. Selendis claimed that Zeratul could not be trusted, and reminded those present that it was Zeratul's actions in the Great War (the slaying of Zasz, and through him, connection to the Overmind) that had allowed the zerg to find and invade the planet in the first place. Artanis was more cordial to the Nerazim, but nonetheless stated that too many lives had already been lost to call off the invasion now. As such, he ordered Selendis to begin warping their forces in.
The protoss landed outside the ruined city of Khereson, where they fought through the zerg to reactivate its warp network. They succeeded, though not before encountering zerg who were not feral, and being forced to slay the hybrid reavers that were providing the control. Artanis turned command of the invasion over to Selendis, while he retired to discuss things further with Zeratul.
When Selendis lost contact with Artanis, she asked Zeratul to lead a force to find him. Like many of the Khalai, Selendis fell under Amon's thrall per his corruption of the Khala. She led her fellow thralls against the Daelaam, serving as Amon's own vessel after being cast out of Artanis, but her former comrades were able to escape Aiur in the Spear of Adun.
En Taro ArtanisEdit
Having gathered new allies, the Daelaam re-launched its invasion of Aiur, destroying the psi-matrix in a bid to delay the Armada. After destroying Amon's body, the Golden Armada arrived under Selendis's command. The Daelaam tried their best to not injure their comrades and wait until the xel'naga Keystone was activated. In the final stages of the battle, Selendis defeated multiple zealots before being held off by Artanis in the temple, and after they gained their conscious back shortly, Artanis asked them to sever their nerve cords. Although Selendis doubted the decision, Artanis persuaded them to be free of Amon's influence and Selendis was the first to cut her nerve cord, while all others followed her. With it, the Armada was freed of Amon's influence. 
Into the VoidEdit
In the midst of Aiur's rebuilding, Selendis was onboard the Spear of Adun when a message was received from Ulnar; a message requesting aid from Kerrigan. Artanis responded to this by bringing the Spear of Adun to Ulnar, with the remaining members of the Golden Armada in the arkship. Selendis and Karax provided support for Artanis' force in the Void, and helped defeating Amon.
In Utter DarknessEdit
- Selendis in the last stand(src)
In the Overmind's apocalyptic vision of the future, Selendis was killed on a distant, shadowed world in the protoss' last stand against Amon, the dark god, leading a carrier fleet and a ground force. Her last words before dying were to ask Tassadar to forgive her for not being strong enough. 
Selendis appears as a hero carrier unit in the mission "In Utter Darkness", which also appears briefly in an in-game cutscene in the mission "Safe Haven". Her interceptors are slightly different than standard interceptors, dealing more damage.
- See: Selendis Quotations
Heroes of the StormEdit
Personality and TraitsEdit
Selendis considers the Dark Templar a threat to her heritage, but is willing to work beside them. She has even developed a reputation among some more tolerant Templar of being biased against the Dark Templar. Nevertheless, she harbors great disdain for Zeratul, who she regards as a traitor (a feeling that is shared by even other Dark Templar), and the one responsible for leading the zerg to Aiur during the Great War.
There is a possibility that Selendis was an executor overseeing the evacuation of Aiur, since she was a student of Artanis (who was executor from Episode III) and currently holds the title of executor. It is also possible that she was an executor who fought Ulrezaj's forces under Zeratul, as she was one of the commanders of the battle and had secret knowledge from it.
Selendis was said to feature prominently in Legacy of the Void. She is said to be representative of where the protoss are going as a species/people. However, in the finished game, she has a minimal role, as she is possessed by Amon early in the campaign.