House Mallister of Seagard is a vassal house that holds fealty to House Tully of Riverrun. Their lands are north of Riverrun, along the west coast of the Riverlands on Ironman's Bay and southwest of the Twins. The castle is near the headwaters of the Blue Fork of the Trident River. The Mallisters are longstanding enemies of the ironborn, as Seagard was built as a defense against marauders from the Iron Islands. House Mallister's Heraldry consists of a silver eagle on a blue field. Their motto is "Above the Rest".