Keiko O'Brien is a fictional character from the television series Star Trek: Deep Space Nine. She is a trained botanist and the wife of Chief Miles O'Brien, a key character in the series. Keiko is known for her strong personality and dedication to her family and career, often balancing her responsibilities as a mother and a scientist. In the series, Keiko plays a significant role in the community on Deep Space Nine, contributing to the station's agricultural efforts. She also faces challenges related to her cultural background as a Bajoran, navigating her identity and relationships throughout the show's storyline.