Main article: Krill.When Ed Mercer and Gordon Malloy infiltrate the Yakar under the guise of surviving crewmembers of the Kakov, they are taken to the ship's chapel during prayer time. Mercer (disguised as a Krill named Chris) and Malloy (disguised as Devon) happen to sit next to Teleya and end up starting a conversation with her. They find out that her brother Arnak was stationed aboard the Kakov, and "Devon" claims that he was good friends with Arnak. This confuses Teleya, as Arnak never mentioned anyone named Devon. According to Teleya, her brother's death at the hands of the humans only served to reinforce her faith in Avis by proving that humans are soulless beings.
"Chris" and "Devon" invite Teleya to share a meal with them at the ship's mess in order to find out more about the bomb being readied for deployment aboard the Yakar. Teleya explains that the plan is to drop the bomb on a Union farming colony on Rana III. When "Devon" points out that Rana III is virtually defenseless, Teleya is unperturbed and smugly replies that is makes the colony an excellent test of the experimental weapon.
Later on, she asks Chris and Devon to speak to her students, who turn out to be Krill children. She quotes a line from the Anhkana as proof that humans have no souls.
When Mercer and Malloy enact their plan to expose the crew of the Yakar to lethal (to Krill) amounts of ultraviolet radiation, Mercer ensures that all the children, as well as Teleya, are safely in the classroom, where he destroys the lights in order to keep the occupants safe.
After killing the entire crew, save for Teleya, Mercer and Malloy take the Yakar to rendezvous with the Orville and hand the Krill ship over to the Union. Aboard the Orville, Dr. Finn examines Teleya and gives her a clean bill of health. Captain Mercer (no longer in disguise) walks in and asks Finn and Alara to wait outside. Teleya angrily confronts Mercer about his murder of her fellow crewmembers, only for him to counter that he had no choice, given that they were planning on destroying an entire colony of peaceful farmers. Mercer tells her that the children will be returned to the Krill, while Teleya's fate remains unknown. Teleya then asks him why he spared the children. Mercer replies that the children are innocent and were not his enemies. Teleya tells him that, after witnessing Mercer and Malloy kill the adults in such a painful and horrific way, the children will grow up to hate the Union, and Mercer in particular.