Tyrion Lannister is the youngest son of Lord Tywin Lannister, and uses his wit and intellect to overcome the prejudice he faces as a dwarf. He is falsely accused of the attempted assassination of Bran Stark and taken captive. His imprisonment by Catelyn Stark, even though he is eventually released after a trial by combat, causes the House Lannister to attack the Riverlands and triggers a conflict, which is then escalated into full war by the death of Robert Baratheon and arrest and execution of Eddard Stark.
Tyrion rejoins the army of Tywin Lannister, and is shortly after sent by his father as acting Hand of the King to his newly crowned nephew Joffrey Baratheon, hoping he will rein him in. With him he takes a prostitute named Shae who he makes his mistress and comes to love. Under difficult conditions, Tyrion Lannister holds the city together, strengthens and organizes the city's defenses, and makes an alliance with House Martell. Tyrion is injured during the Battle of Blackwater and afterwards loses his position as Hand when Tywin Lannister arrives to claim it. [Source: wikia]
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