@Eliminateur
Your previous post says that the the fat guy you see in this chapter is the vice-bishop, not the "hedonistic" bishop. However, unless I'm seriously misunderstanding the either the translation or your comment, that is incorrect. They guy in this chapter IS the bishop. He introduces himself as the bishop who is "in charge of this temple." Also, according to the reception priest, the vice-bishop is out with the other priests dealing with the monsters.
Also, it wouldn't make any sense if the guy in this chapter is the respected vice-bishop, as I'm pretty sure the whole point, as the rest of the commenters have mentioned, is that the bishop is actually a good guy despite his bad reputation.