Tasha Yar is a fictional character from the television series Star Trek: The Next Generation. She serves as the chief of security aboard the starship USS Enterprise-D and is known for her strong, no-nonsense personality. Tasha is portrayed by actress Denise Crosby and first appears in the series' pilot episode, "Encounter at Farpoint." Tasha's character has a complex backstory, having grown up on a troubled planet. Her experiences shape her dedication to protecting her crew and upholding the law. Despite her tough exterior, Tasha also shows vulnerability and depth, making her a memorable part of the Star Trek universe.