Hallyne is the head of the Alchemists' Guild in King's Landing, in charge of the city's stocks of wildfire and concerned with other fire-related matters. In the television adaptation Game of Thrones he is portrayed by Roy Dotrice. During the reign of Aerys II Targaryen, in which the Guild returned to prominence, Hallyne was an acolyte of the Guild. Later, as Robert's Rebellion raged on, Hallyne heard rumors that Aerys had commissioned the Guild's Wisdoms, led by Rossart, to create a great weapon to employ against Robert Baratheon. However, the city was sacked before the weapon could be unleashed and many of the Wisdoms assassinated.
