Fan Casting Grey Worm in A Song of Ice and Fire

Grey Worm is an Unsullied purchased by and sworn to Daenerys Targaryen. He is the commander of Daenerys's Unsullied and one of her trusted advisors. According to a semi-canon source, Grey Worm has absolutely no facial hair, though the hair atop his head is short and brown. He is stocky, of medium height and square. He has a serious looking face, on the edge of solemn. The Unsullied do not display much emotion. He is young, in his late twenties or so.