Who is Wulfgar from Heir Apparent and what is their importance?

Prince Wulfgar is Cynric's eldest son. He is the only one of the brothers who has facial hair, and he has a goatee that Janine thinks looks sexy. He is also able to change himself at will into a wolf. When Janine arranges to go to the dragon's lair to retrieve the barbarians Midas crown, she requires help from the magic users in the realm. Orielle, whose specialty is potions, offers to create a strength potion for her, but in payment she wants Wulfgar as her husband. Wulfgar agrees.