Thorben is the estranged father of Illiaph Felspark and the scion of House Felspark. He is a cold and ruthless man who prefers to delegate responsibility to others rather than take action himself.
He disproves of Illiaph's actions and resents the boys refusal to honour the house pact with Pholrex.
He is a close ally of Osgrim Hellslay and has had a life-long rivalry with Lassandra Legault.