Ezri Dax Ezri Dax was a joined Trill and the ninth host of the Dax symbiont . She served as counselor aboard Deep Space 9 , beginning in 2375 . She was joined to Dax shortly after the death of its previous host , Jadzia . ( ) Origins . Dax , formerly Ezri Tigan , was born on New Sydney in the Sappora system . Her mother was a successful mining magnate on Sappora VII , and she and Ezri disagreed on many occasions . Her father was often absent – Ezri noted it was because he couldn ' t bear to be around his wife . Ezri ' s closest family member was her younger brother , Norvo ( who gave her the nickname Zee ) , while her older brother , Janel , was someone whom she looked up to . Ezri dreamed constantly of ways to escape her family , and eventually managed to do so by joining Starfleet . ( ) Joining with Dax . In 2375 , Ezri was an ensign serving as an assistant ship ' s counselor aboard the when it was dispatched to Deep Space 9 on a medical emergency – to carry the symbiont back to following the death of its previous host , Jadzia Dax . En route , the symbiont took a turn for the worse , and , as the only Trill aboard , though one who had decided against joining , Ezri had little choice but to undergo the joining procedure , with only a fifteen minute lecture from the ship ' s non - Trill surgeon to prepare her . Following the joining , Ezri returned to Trill with the " Destiny " , and met with members of the Symbiosis Commission ' s Evaluation Board , who gave her counseling on how to deal with her new memories , but they were unable to help her further . With her friends and family having difficulty adjusting to her changed personality , and her own confusions about who she really was , Ezri took a leave of absence . Seeking some sort of link to the person she was now , Ezri sought out Benjamin Sisko , a friend of Dax ' s previous two hosts , to see if he could help her through the difficult process of integrating eight lifetimes of experience . At the time , Sisko was searching for the Orb of the Emissary , and Ezri agreed to accompany him , Jake , and Joseph Sisko , to to find it , noting " " it ' ll be just like old times . . . except , different " " . It was while traveling there that Ezri discovered she now suffered from space sickness – warp drive made her ' a little queasy ' . Another effect of the joining was a change of dexterity , from right hand to left hand . Despite her rapid mood swings and general insecurity , Ezri was able to help Sisko discover the Orb , and restore the Prophet s to the Celestial Temple . ( ) On Deep Space 9 . At that point , Sisko returned to Deep Space 9 , bringing Ezri along with him . She found Jadzia ' s former colleagues still grieving for her , and was prepared to return to her duties aboard the " Destiny " , hoping to reduce their pain in seeing her . However , Captain Sisko asked her to remain aboard to work as the station ' s counselor , with a promotion to lieutenant junior grade , and waived her remaining training . Her first assignment was to attempt to alleviate Elim Garak ' s claustrophobia . But , when the sessions broke down , and Garak turned on her , the emotional anguish caused her to decide to resign her commission . She quickly changed her mind when she was finally able to diagnose the root of Garak ' s attacks . Although many of Jadzia ' s friends and colleagues quickly accepted the presence of a new Dax in their lives , her relationship with Jadzia ' s widower , Worf , did not go quite as smoothly . Initially , Worf wanted nothing to do with her , considering her presence an affront to his wife ' s memory . However , he soon realized that his actions were more of an affront , and relations between them began to warm . ( ) Ezri played in the Niners baseball team against the Vulcan team , the Logicians , from the as an outfield player in center field . During practice , she damaged her knee trying to make a catch , but recovered enough to play in the game , making an impressive catch using some of Emony ' s gymnastic skills ( Julian Bashir dubbing it a " Fancy Dan " ) , and taking over from Miles O ' Brien as first base coach following Sisko ' s ejection from the game . ( ) Following Dr . Bashir ' s treatment of Sarina Douglas , Ezri helped her settle in , and supported Bashir when the treatment appeared to have broken down . Sarina noted of Ezri : " " The day she realizes that she ' s more than just the sum of her parts , she ' s really going to be something " . " ( ) When Kor visited the station , seeking a command in the war , Ezri once again found herself having difficulty separating herself from Dax ' s previous hosts , wanting to go off with him , fighting side by side . Quark overheard part of her conversation with Kira Nerys over the subject , and misinterpreted it , believing she wanted to pursue a relationship with Worf again . When he confronted her over his objection to such a move , Ezri set the record straight , but considered it one of the kindest and dearest things she ' d ever heard . ( ) Quark was very taken with the young Trill , as he had been with Jadzia , and continued to pursue her for many months . Ezri accompanied the when it resupplied the Starfleet position at AR - 558 in the Chin ' toka system . While there , she bonded with one of the engineers there , Kellin , and helped come up with the method to expose the " Houdini " subspace mine s that littered the planet . When the " Defiant " was forced to break orbit , Ezri remained on the surface . It was her first experience of conditions on the front lines , and in the brutal Jem ' Hadar assault that followed , she acquitted herself well . ( ) Following the events at AR - 558 , Ezri attempted to assist Nog in dealing with the trauma of losing his leg in the attack . However , Nog ' s post - traumatic stress caused him to seek comfort in the Vic Fontaine program , rejecting other ' s efforts to help . Despite this , Ezri continued to support him , advising his friends and colleagues to give him time , and giving Vic hints on how to push Nog back towards reality . ( ) Shortly thereafter , Ezri returned home to Sappora VII for the first time in three years , when O ' Brien disappeared on New Sydney while searching for Morica Bilby . She found it difficult to reintegrate herself into her family , and when it was revealed that Norvo had been responsible for Morica ' s death , blamed herself for not being there for him to help her brother sort himself out before it happened . ( ) Ezri got on very well with Hector Ilario , another new officer aboard the station , and , following his murder , she decided to investigate on her own . However , lacking in knowledge of criminalistics , she chose instead to confront Joran , Dax ' s sixth , and shortest - living , host . Joran ' s presence in Dax persuaded Ezri to perform the Rite of Emergence , so that he could direct her in finding the killer . The Joran aspect attempted to turn Ezri towards his own mindset , but she was able to resist to some extent , and was relieved to be able to force Joran ' s memories deep within her subconscious once the killer was caught . ( ) When Vic ' s program triggered a secretly - embedded jack - in - the - box subroutine , Ezri helped in the plan to restore the scenario to normal , working herself into the program as a waitress . ( ) Not long after , Ezri encountered Captain Boday , the Gallamite , who had dated Jadzia for a short time . The two shared dinner , something Bashir and Worf disapproved of . ( ) Following the destruction of the , and the disappearance of Worf near the Badlands , Ezri found herself once again struggling to separate herself from the memories of Dax ' s previous hosts . Seemingly driven by her memories of Jadzia and Worf ' s relationship , Ezri appropriated a runabout , and set off in search of his escape pod , disobeying direct orders from Captain Sisko in the process . Worf was recovered safely ; however , when they attempted to return to Federation territory , the runabout was attacked by two Jem ' Hadar fighter s , and destroyed in the atmosphere of Goralis . While awaiting rescue , the close quarters and general air of tension between Worf and Ezri led to them sleeping together . This new development in their relationship was cut short , however , when a few hours later , the two were captured by a group of Breen , and taken to a vessel in orbit . ( ) During their captivity , Ezri soon realized that Worf was seeking a relationship with her in an attempt to recapture that which he had with Jadzia . Both were subjected to intense mental interrogation , torture and mistreatment during their captivity aboard the Breen warship . When Ezri was returned to their cell following one session , she unknowingly expressed feelings for Julian Bashir , something that surprised even her . However , this admission soured her relationship with Worf yet again – albeit temporarily . The pair were then transported aboard a Jem ' Hadar fighter , as negotiations between the Dominion and the Breen Confederacy got underway . ( ) Ezri and Worf were taken to Cardassia Prime , where it was intended that they would face trial and execution for war crimes soon after . Knowing how little time they had left , just before they were to be executed , the two were able to reach a final reconciliation over their previous relationship and come to a new understanding – as friends . However , they were able to escape back to Deep Space 9 with the unexpected assistance of Damar , who , having become disillusioned with the Dominion and Cardassia ' s waning influence in the quadrant , gunned down their Jem ' Hadar executioners and told them how to escape Dominion territory , and to let Starfleet know that they had an ally on Cardassia . ( ) Ezri and Worf returned to Deep Space 9 as news filtered in of the attack on Earth . Settling back into life on the station , Ezri found it difficult to reconcile her newly - discovered feelings for Bashir with her friendship with the doctor and sought support from Worf as to whether she should disclose her feelings to Bashir . She began avoiding Julian , which led to him confronting her over it . Ezri was preparing to tell Bashir when he was called away . The situation was set aside when the Breen launched a counterattack at the Chin ' toka system , leading to the Second Battle of Chin ' toka , at which Ezri manned the communications console aboard the " Defiant " . When the vessel was disabled by the Breen energy dampening weapon , Ezri safely evacuated along with the rest of the ship ' s complement . ( ) Following the " Defiant " crew ' s safe return , Bashir once again attempted to discover the reason behind Ezri ' s avoidance , and , once again , Ezri ' s attempt to disclose her feelings was cut short , this time by Julian ' s discovery that Odo had become infected with the morphogenic virus affecting the Founder s . The confusion led Bashir to believe that Ezri was seeking to restart her relationship with Worf . ( ) Ezri later helped Worf determine the correct course of action to take following Gowron ' s disastrous attempt to take control of the Klingon defense strategy . Considering it a small piece of a larger puzzle , she noted that the Klingon Empire as a whole had become corrupted , and felt that the society was in deep denial about the true nature of their leaders . She discovered that both Worf and Martok had decided to make her a member of the House of Martok – Martok considered her " an honorable woman and a worthy successor to Jadzia " . Ezri thought it was very sweet of him . ( ) At some point during the year , Ezri had loaned Julian a copy of " A Tale of Two Cities " that had belonged to Jadzia . It was this book that enabled him to realize that he and Miles O ' Brien were trapped inside Luther Sloan ' s mind . Ezri was the one who discovered the two in an empty science lab after O ' Brien missed an appointment to fix her sonic shower . ( ) The awkwardness between Ezri and Julian continued , now with both avoiding the other . Finally , they confronted each other and admitted their feelings . Both agreed that their friendship was too important to risk jeopardizing it and decided to remain friends . However , that idea was quickly abandoned , and the two shared their first kiss in a turbolift heading to ops , much to the chagrin of Worf and O ' Brien . ( ) Ezri and Bashir spent their first night together the day before the new departed to lead the Allied invasion of Cardassia . The two made a pact to come back alive . Ezri once again manned the communications console during the Battle of Cardassia . Following the successful conclusion of the battle , and the end of the war , Ezri encouraged Worf to accept Chancellor Martok ' s offer of a position as Federation Ambassador to the Empire . Ezri remained on Deep Space 9 following the war . ( ) Appendices . Appearances . Ezri appeared in every episode of DS9 ' s seventh season , the only one in which she was a cast member . Background information . Ezri Dax was played by Nicole de Boer . While Ira Steven Behr and Ronald D . Moore were creating the character of Ezri Dax , they presumed she would be a regular character , but some initial uncertainty was involved . " " I ' ve got a pretty good idea , " " commented Behr , " " but it could always change , casting could always change . " " Moore stated , " " We haven ' t really crystallized it yet . It ' s safe to say we are virtually certain it ' s going to be a woman . " " ( " Cinefantastique " , Vol . 30 , No . 9 / 10 , p . 51 ) At first , there was some speculation that the new Dax host might meet Jadzia Dax , similar to how Jadzia meets Curzon Dax in . However , this turned out not to be case for Ezri . ( " Cinefantastique " , Vol . 30 , No . 9 / 10 , p . 50 ) The writing staff put a lot of effort into trying to create Ezri Dax as an interesting character . Ron Moore has stated , " " It felt like the best way to go was to go young , to go with a young , fresh - out - of - the - Academy kid , who is now an old soul , and to have that host not be so adept at it . This is a person who wasn ' t quite ready for this whole honor that has been bestowed on them , and is having adjustment problems . " " ( " Special Crew Dossier : Ezri Dax " , DS9 Season 7 DVD special features ) The casting choice of Nicole de Boer felt immediately right to Ira Steven Behr . He has commented , " " I can say that when Nikky walked in to audition , she was " exactly " what I had in mind , the way she looked , the way she acted , just the whole package was exactly what I saw Ezri Dax to be . " " ( " Special Crew Dossier : Ezri Dax " , DS9 Season 7 DVD special features ) The newly created character brought a fresh streak to in its final season . Ira Behr has pointed out , " " It ' s very tough in the last year , because a ) you ' re thinking so much about the end of the series , and b ) you ' re so busy worrying about , ' Well , we don ' t want to repeat ourselves . ' So to have this new character suddenly come on , who ' s not a new character , because she ' s still Dax , was just such a wonderful thing for us , because it was like , ' Oh , we know what to do with that . We could give you twenty stories with that . ' We had to cut back on those stories because we didn ' t want to have the cast up in arms about just doing Ezri Dax stories . Because she brought so much baggage with her , from Jadzia , it was like , ' Oh , we can play in that pond for weeks . " " ( " Special Crew Dossier : Ezri Dax " , DS9 Season 7 DVD special features ) Michael Piller thought the introduction and integration of Ezri to the series was highly successful . He commented , " " I wish I had done that in the . I ' m not saying that Jadzia wasn ' t successful , but it took a long time to make Dax successful . She became a kind of dry wit . As Ezri , she had issues and conflicts . Instead of having her character change off camera , she was thrown into chaos on camera . It was a great twist . " " ( " DS9 Goes Out Strong and Defiant to the End " , ) Nicole de Boer has approved of the role Ezri played as a counselor . " " It ' s ironic to have this person being a counselor when she ' s so messed up herself , " " de Boer remarked . " " It makes her a good counselor , actually , in some ways , because she can relate really well to people . She has a different way of doing it ; it ' s not Deanna Troi . It ' s not that type of counseling , but it ' s different , it ' s good and it works for Ezri ! " " ( " Meet Ezri Dax : Nicole de Boer " , ) In the original ending of , Ezri orders bloodwine ( which she hates ) in Quark ' s , to toast Martok . When Ezri goes to toast Worf ' s brief time as the Klingon leader , Ezri asks how that felt . Worf tells her that he wished his father , Mogh , could know he was Chancellor , if only for a moment . Ezri tells Worf that his father knows , as does Jadzia . The two then toast Chancellor Worf . ( " " ) Prior to the introduction of Ezri Dax , " Star Trek " author Peter David once joked to his actor friend Bill Mumy that he could perhaps play the ninth host of the Trill symbiont . Mumy rejected that notion when it was pointed out to him that doing so might mean he would have to play the new character as being married to Worf . Apocrypha . In the of novels , Ezri begins to integrate her past lives into her current personality , prompting her to change to a career in command , changing her uniform department color to red . This process of integration led to much confusion and frustration in her relationship with Dr . Bashir , which eventually dissolved in " " . In " Mission Gamma " she is assigned as executive officer of the during a historic post - war mission of exploration in the Gamma Quadrant . As of the novel series " " , Ezri Dax has been promoted to Captain – albeit due to the deaths of her previous senior officers during a recent battle – and serves as commanding officer of the Federation starship USS " Aventine " . In " Destiny " , Dax works with Jean - Luc Picard and William T . Riker to save the Federation from the Borg , during which Worf - now first officer of the - assures her that her new captaincy does honor to Jadzia ' s memory , despite Ezri ' s initial concerns that Worf would resent her promotion over him , particularly since his lack of a captaincy can be attributed to his decision to save Jadzia ' s life over completing a key mission . Dax also appears in the " " novels " Zero Sum Game " and " Brinkmanship " and the " " novels " Revelation and Dust " , " A Ceremony of Losses " and " The Poisoned Chalice " . Ezri ' s next appearance was in the novel " Takedown " , where the " Aventine " was enlisted by now - Admiral Riker as part of a Cytherian plot . In the background story for " Star Trek Online " Ezri is retired from Starfleet by the year 2401 when she objects to Federation inaction in the face of proven Alpha Quadrant infiltration by Species 8472 . Trivia . Ezri Dax was the only main cast member from the four " Star Trek " series in existence during the Playmates license not to receive an action figure from the company . Diamond Select Toys released an Ezri figure in late 2007 . Ezri is one of only two main characters since TNG to not have appeared as a hologram . The other is Jake Sisko .