Amarantha is a fictional character from the book series A Court of Thorns and Roses by Sarah J. Maas. She serves as the main antagonist in the first book, where she is depicted as a powerful and cruel fae queen. Amarantha is known for her sadistic nature and her desire for control over the lands of Prythian. In the story, Amarantha captures the protagonist, Feyre Archeron, and subjects her to a series of deadly challenges. Her character embodies themes of power, manipulation, and the consequences of tyranny, making her a significant figure in the narrative's exploration of good versus evil.