Rise of the Runelords
Father Astalar Zantus
Father Zantus is a cleric of Desna, though his role as high-priest requires him to be open to other faiths, and he is more than willing to assist followers of other gods with spiritual matters.
Zantus always seems to meet Arcane Investigations at the worst of times. He is very familiar with patching up their wounds and has also helped them deal with the undead on two separate occasions.