The Dunsirn family is a family of bankers and investors, and Highland Financial is just one of many Dunsirn companies. However, Terrance happens to be the CEO of this specific company. He's recently opened a branch in Prospect, hoping to get involved in the American west coast financial scene.
Giovanni
The Dunsirn are a Scottish branch of the Giovanni Clan. Terry doesn't really like the main Italian line of the Clan, thinking of them as arrogant and condescending. Terrance was one of the first Dunsirn embraced into the Clan, and he's never forgotten how they were treated in the early days. Still, when it comes down to it he is Giovanni.
Wraith
Terry was first made able to see the dead after a near death experience at the Battle of Rullion Green in 1666. He's quite knowledgeable about them by now.