Tasya Vos is a fictional character from the 2020 science fiction horror film titled Possessor. She is portrayed by actress Andrea Riseborough. In the film, Tasya works as an assassin who uses a technology that allows her to take control of other people's bodies to carry out her missions. This process is both physically and mentally taxing, leading to complex psychological consequences. The film explores themes of identity, control, and the impact of technology on human consciousness. Tasya's character grapples with her own sense of self as she navigates the challenges of her dangerous profession, making her a compelling figure in the narrative.