Tyrion Lannister
From Asoiaf
Tyrion of House Lannister, called the Imp, is the second son of Tywin Lannister, Lord of Casterly Rock and Lady Joanna. He is a dwarf.
His mother died in childbed.
After the sudden death of the Hand of the King, Jon Arryn, Lord of the Eyrie Robert Baratheon, King of the Seven Kingdoms decided to travel north with the royal family to see Eddard Stark, Lord of Winterfell. Tyrion was among those following the king.