Who is Ragnor de Marte from The Wolf and the Dove and what is their importance?

Ragnor de Marte is one of the soldiers who arrives at the home of Aislinn on behalf of Wulfgar. Ragnor kills Erland, attempts to rape Aislinn, leads Gwyneth into believing he cares for her and continues to pursue Aislinn to the point that he kidnaps her and her son, Bryce. Ragnor dies at Gwyneth's hand, but not before he mortally wounds Gwyneth.