A Soviet agent in Julian Bashir's 1960s spy holosuite programme, who takes on the physical form of Kira Nerys in 2372 after a transporter accident stores the crew's patterns in the station computer.
Colonel Anastasia Komananov is a holographic character in the fourth-season Deep Space Nine episode Our Man Bashir. She is a KGB operative and an old flame of Bashir's secret agent persona, written as an ally and romantic interest.
When a runabout explodes during transport, the physical patterns of five officers are saved in the holosuite, replacing characters in the running programme, and Komananov acquires Kira's body. She briefs Bashir on the disappearance of leading scientists and sets him and Garak on the trail of Hippocrates Noah.
Because her death would erase Kira's pattern, Bashir has to keep her alive through the whole adventure, with the safety protocols disengaged.