Theon Greyjoy is a character from the fantasy series "A Song of Ice and Fire" by George R.R. Martin, which was adapted into the television series Game of Thrones. He is the son of Balon Greyjoy, the Lord of the Iron Islands, and is raised as a ward at Winterfell alongside the Stark family. Theon struggles with his identity and loyalty throughout the series. As a young man, Theon seeks to prove himself and gain his father's approval. His actions lead to significant consequences, including betrayal and conflict with the Stark family. Theon’s journey explores themes of honor, redemption, and the complexities of family loyalty.