Cecilia Tallis is a fictional character from the novel "Atonement" by Ian McEwan. She is the daughter of the Tallis family and is portrayed as a strong-willed and intelligent young woman. Set in the early 20th century, Cecilia's life is significantly impacted by her relationships and the events surrounding her family's estate. In the story, Cecilia develops a deep bond with Robbie Turner, the son of the family’s cook. Their relationship becomes central to the plot, especially as misunderstandings and societal pressures lead to tragic consequences. Cecilia's character embodies themes of love, sacrifice, and the quest for redemption.