Silas worked as a bartender at Carpe Noctem. He killed a Redcap named Ba'al and framed Dyson for the murder. His motives were unusual for a Dark Fae, since he did it to save a human girl from becoming Baal's next victim.
His fate is unknown, but is probably dead. He was last seen in the clutches of The Morrigan and Vex, with the latter clearly intent on torturing him.