A light in the smoke

After their house burned down, and the king of the overpopulated village passed, a fair maiden Aphmau lives with her Aunt who secretly makes potions. Since the king died, the townsfolk have to choose between three men to become their ruler. One night Aphmau wanders outside and finds an Ultima feasting on a human body. Later on a king is chosen, and eventually falls in love with Aphmau, also including the Ultima. But who is the Ultima werewolf?