Who is Wulfgar from The Wolf and the Dove and what is their importance?

Wulfgar is one of William's knights, Wulfgar has lived the majority of his life believing he is a bastard - a lie told by his mother because his father favored him over his brother. As it turns out, Wulfgar's brother was the bastard and his mother was likely seeking favor for that son, prompting her to tell the lie. Wulfgar has a chip on his shoulder about this point but is in all other ways completely fair. When he discovers that Ragnor has killed Aislinn's father and several of the serfs who served him, Wulfgar is livid. He tells Ragnor that had Erland been approached with tact, he would have been won over to surrender without bloodshed. He tells Ragnor that everyone will be needed to make Darkenwald and Cregan productive enough to survive the coming winter and that those killed were slain unnecessarily.