He owned a slave named Fennesz, who was tasked with educating the children of the household. After Daenerys Targaryen took the city and freed all the slaves, Fennesz asked her to be allowed to re-sell himself into slavery, as Mighdal and his family had treated him well. The queen allowed for Fennesz and Mighdal to sign a contract of employment, but only for a period of one year at a time.