Tyrion Lannister is the third and youngest child of Lord Tywin Lannister of Casterly Rock and his wife, Lady Joanna. Tyrion is an ugly and misshapen dwarf, and because of this he is sometimes mockingly called the Imp and the Halfman. Despite his deformation and the social stigma that comes with it, Tyrion's wit and intelligence prove to be great assets to the Lannister cause. However, a difficult relationship with his father, as well as with his sister, Queen Cersei, prove central obstacles to him and his ambitions. Thanks to the War of the Five Kings, Tyrion rises high, acting as Hand of the King to Joffrey I Baratheon, but he reaches his zenith at the Battle of the Blackwater, where he suffers a nearly-mortal wound that leaves him disfigured and pushed out of power.