Illyrio Mopatis

Illyrio Mopatis is a character in Game of Thrones. He is played by Ian McNeice and appears in the first episode of the series.

Illyrio Mopatis is a Magister or merchant-lord of the Free City of Pentos, located across the Narrow Sea to the east of Westeros. Immensely rich and powerful, Illyrio is a friend and ally to Viserys and Daenerys Targaryen.

In the books
In the Song of Ice and Fire novels, Illyrio is a fat, middle-aged man who dresses in rich finery. He favours using money and wealth to overcome problems rather than honour and valour. He is politically canny and astute.