K ' Ehleyr K ' Ehleyr , the daughter of a Human mother and a Klingon father , was an ambassador and special emissary of the Federation in the 2360s . Biography . K ' Ehleyr described herself as being " trapped between two cultures " with bi - racial parents . Having the humor of her mother and the temper from her father , she preferred her human side and exercised tight control of her Klingon tendencies . Her Klingon side nevertheless gave her strength , even if terrifying . ( ) Though K ' Ehleyr knew much about Klingon culture and fighting techniques , she never showed much respect for Klingon values , which was sometimes a cause of great fury for Worf . Consequently , she never taught Alexander about the Klingon way of living before her death . ( ; ) In 2359 , she had a relationship with then Lieutenant Worf , but neither felt ready to engage in a deep relationship , so they separated . In 2365 , she traveled from Starbase 153 to the on an urgent mission to intercept the Klingon sleeper ship , which was about to become active . The vessel would have been unaware of the Federation - Klingon alliance , therefore posing a threat to Federation establishments in the Boradis system . While searching for the " T ' Ong " , she renewed her relationship with Worf , but refused to marry him when he asked her . Due to this short renewal , however , she gave birth to a son a year later . On the mission , she tried to persuade Captain Picard to destroy the Klingon ship as soon as possible , but thanks to an idea of Worf ' s , this could be prevented : to convince the " T ' Ong " crew of the Alliance , Worf posed as the captain of the " Enterprise " - D , with K ' Ehleyr as his first officer . After the " T ' Ong " crew had agreed to lay down their weapons , K ' Ehleyr beam ed aboard the " T ' Ong " to prepare the crew for the 24th century while waiting for the . Before transporting over , Worf told her that he would never be complete without her . ( ) In 2367 , she accompanied Klingon chancellor K ' mpec , who had chosen Picard as Arbiter of Succession , to a meeting with the " Enterprise " - D . When she came aboard , Lt . Worf learned of his son Alexander for the first time . K ' Ehleyr expressed her desire to become Worf ' s mate at this time , but he refused , saying that he did not desire to share his discommendation with her and Alexander . After K ' mpec ' s death , she assisted Picard in the Rite of Succession , briefing him about Klingon rituals and tradition . As she therefore had much influence on the Rite , Gowron tried to bribe her with the command over a Klingon ship or a seat in the Klingon High Council , but she refused . Later , she discovered evidence that proved Duras was involved in the conspiracy that led to Worf ' s discommendation ; on learning of her search through attempts to access Klingon High Council records he sealed , Duras attacked K ' Ehleyr in her quarters and killed her . Worf transported to Duras ' ship shortly later and killed him in vengeance . Afterward , Worf claimed Alexander as his son and placed him in his adoptive parents ' care on Earth . ( ) Alexander kept a picture of his mother next to his bed aboard the " Enterprise " - D . ( ) In 2374 , Quark joke d that Alexander must have gotten his looks from his mother ' s side of the family . ( ) Appendices . Background information . According to a reference cut from the script of , K ' Ehleyr met Worf on Samrin ' s Planet in 2359 . When they were reunited six years later , K ' Ehleyr was disappointed at how much Worf had changed since their initial encounter . Ronald D . Moore commented regarding K ' Ehleyr ' s death : " " I am happy to pass the buck on this one to Michael Piller . It was his idea to kill K ' Ehleyr during the story break because it would be a great dramatic turn and would provide Worf with ample reason to go stick a " bat ' leth " into Duras ' guts . " " He also mentioned that bringing back K ' Ehleyr had come up a number of times . The role of K ' Ehleyr was originally offered to actress Robin Curtis , but her commitment to another film project prevented her from taking the role . " kay - LAHR " was the pronunciation of this character ' s name from the script pronunciation guide for " The Emissary " . Apocrypha . In Peter David ' s non - canon " " series , Worf and K ' Ehleyr first meet while Worf is attending Starfleet Academy . A subtle reference is made to K ' Ehleyr in the " " series , which features the female Q , another character played by Suzie Plakson ; when the two are first introduced , Picard finds her features slightly familiar , but cannot place exactly where he " recognizes " her from . Additionally , in the episode , the same female Q , when told off by B ' Elanna Torres over an engineering problem , says she ' s always liked Klingon females as they are " spunky . " In the Pocket TNG novel " Diplomatic Implausibility " places K ' Ehleyr ' s grave site as in New York City ; by coincidence , Lt . Marla Aster , whose son Jeremy Aster became a member of Worf ' s family after her untimely death , is buried there as well . The mirror universe novel " Rise Like Lions " introduces K ' Ehleyr ' s mirror universe counterpart ; the result of her mother being captured and brutally raped by several Klingons before she was rescued , K ' Ehleyr joined the Terran Rebellion , becoming first officer of the Rebellion ' s " Enterprise " under the mirror Picard ( K ' Ehleyr reasoning that the crew would not be comfortable with even a half - Klingon in a position of total power over them ) .