Their seat is the fortress of Sunhold, which was formerly the summer palace and resort of House Blackgard. Following the events of the Ebonheart Massacre, several Borderlands houses, also known as the Borderlords, defected from the main branch and swore allegiance to Sofina instead.
The official words of the house are None Shall Pass, which they share with their overlords. The house is currently funded and supported by House Baerley, the Great House of Dorne. To showcase this alliance, the house adopted a golden sun on red black quartered with two crossed black swords on white as their sigil.