Viserys Targaryen

Viserys Targaryen is a major character in Game of Thrones. He is played by Harry Lloyd and debuts in the first episode.

Viserys is the son and heir of King Aerys II Targaryen, who was killed during the Sack of King's Landing during Robert's Rebellion. Viserys was safe with his pregnant mother in hiding. After his mother died in childbirth, Viserys and his baby sister Daenerys were smuggled to safety in the Free Cities across the Narrow Sea. Viserys claims the title King of the Seven Kingdoms and refers to Robert Baratheon only as 'the Usurper'. After some years spent frutilessly wandering the Free Cities looking for military support to retake his throne, Viserys and Daenerys are now guests of the powerful Magister Illyrio Mopatis in Pentos.

In the books
In the books Viserys is an ambitious, arrogant and power-hungry young man with a streak of cruelty and a famous temper.