Top 50 Star Trek Characters – #40 Tasha Yar/Sela
Tasha Yar was Chief of Security on the Enterprise-D.
While she held that position, Yar was efficient and often called the shots when it came to security procedures. Unfortunately her stint in that role did not last long, as she was killed in the line of duty. Tasha was especially close to Data, Worf, and LaForge.
As a result of a brief change in the timeline, Yar was captured by Romulans back in the days of the Enterprise-C. As a result of her captivity, she and a Romulan Commander produced a daughter: Sela. (Yes, this is a bit of a two-for-one.)
Sela would learn to dislike her human mother, and considered herself a proud Romulan. She would grow up and begin to mastermind plots against the Federation, while at one point also plunging the Klingon Empire into civil war.