Col. Kira Nerys is a fictional female Bajoran in the Star Trek - Deep Space Nine series. The character was portrayed on screen by Nana Vistor. Kira Nerys is an one time Bajoran freedom fighter, fighting the Cardassians oppression on Bajor population. She had a romantic side to her with trysts with Constable Odo. When Nana Vistor became pregnant in real life, they wrote her pregnancy into the story, he became a surrogate for Chief Miles O'Brien' s wife.