Wow, this is REALLY well done, I love your painting technique. For whatever reason, I really like his hand.
Though if he's supposed to be wearing a Roman Catholic priest's attire, that little white square is supposed to be an insert that slides into a black collar. It looks sort of tacked on. Barely noticable though.
I dunno if it's the story you're talking about, but somehow reminds of arcana, a webcomic about vampires, harpies and bishie cuddling (This one -> [link] )
Talking about the image, it looks very gloomy, the atmosphere is great with all those bluish grays, and the only thing I don't like much is the perspective of the building, as I find it a bit too much seeing as the point of view is parallel to the horizon, as the character is seen at normal height, and not from a point under his line of view. Other than that, a great work, as always