Rise of the Forgotten Kings
Soldier/Bodyguard for Rhegar
Mysterious and powerful defender of King Rhegar I, King of the Human Lands and the First of his Name, he is a confirmed Finger of Dracarys, and has a connection to Rayne. It is possible he is her long-lost brother Crestus, although this is unconfirmed.
It was eventually discovered that Blackheart was originally a Paladin of Heironious, but was seduced by evil and destroyed his order. He now rules over and resides in the newly-founded Church of Hextor (now known as The Fist), keeping prisoners like Ellay, Rhegan, and Lute, and being a general evil dick.