Grima is a character from J.R.R. Tolkien's literary works, particularly known for his role in The Lord of the Rings. He serves as an advisor to King Théoden of Rohan but is secretly in league with Saruman, the dark wizard. Grima's manipulative nature leads to the weakening of Théoden and the kingdom. Often referred to as "Grima Wormtongue," he is characterized by his deceitful and treacherous behavior. His influence over Théoden causes strife within Rohan, but he ultimately faces consequences for his actions as the story unfolds, highlighting themes of betrayal and redemption.