House Uller of Hellholt is one of House Martell's most powerful vassals. Currently, the Lord of Hellolt is Harmen Uller. His natural born daughter is the paramour of Prince Oberon Martell, the aptly named Red Viper. They are reputed to be impulsive and unpredictable. A Dornish saying states "Half of the Ullers are half-mad, and the other half are worse." This family is a warmongering blood thirsty brood and baiting them into action would not take much goading.