Timelines of all regular characters can be found here.
Click on the name of the character for more details on that character.
Name Actor Brief identification Dr. Julian Bashir Siddig el Fadil (Alexander Siddig) Human; lt. j.g., later full lt.; chief medical officer Ezri Dax Nicole deBoer Joined Trill; ensign, later lt.; station counselor (7th season) Jadzia Dax Terry Farrell Joined Trill; lt., later lt. commander; science officer (1st through 6th seasons) Kira Nerys Nana Visitor Bajoran; major, later colonel; second-in-command and liaison officer Miles O'Brien Colm Meaney Human; chief petty officer; chief of operations (head engineer) Odo Rene Auberjonois Changeling; security chief Quark Armin Shimerman Ferengi; proprietor of Quark's Place Benjamin Sisko Avery Brooks Human; commander, later captain; commanding officer Jake Sisko Cirroc Lofton Human; son of Benjamin Sisko; became writer Worf Michael Dorn Klingon; lt. commander; strategic operations officer (4th through 7th seasons)
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