Tyrion Lannister is the youngest son of Lord Tywin Lannister and younger brother of Cersei and Jaime Lannister. A dwarf, he uses his wit and intellect to overcome the prejudice he faces.

He is a dwarf, causing him problems and persecution. His size has led him to being referred to derisively by various names, such as "the Imp" and "The Halfman". This is mitigated by his intellect and his family's wealth and power. Had an infant with dwarfism like Tyrion been born a commoner, he'd have simply been left out in the woods to die. However, Tyrion was born into a powerful noble House, and was therefore spared. Even though his father doesn't think much of him, he has had the benefits of being raised with wealth and education, and is expected to lead his life as a credit to the Lannister name. He is committed to the good of both his House and, since Cersei married King Robert Baratheon, his family's continued hold on the throne.