Maoyuu Maou Yuusha episode 9 is mostly about the central church coming to get rid of the Crimson Scholar. Unfortunately for them they did not account for the feelings of the commoners.
The common people in Maoyuu Maou Yuusha went from having little food to having plenty due to the Crimson Scholar. They no longer have to be cannon fodder and die in stupid plans against demons to get what little food they have. Why would they believe that the person who made all this possible is a heretic when the people who watched them starve or die were not? The Crimson Scholar was a figure they knew in person as well and they could pick her out unlike the king or the people from the church. Obviously many of them would consider her a goddess or sent by the ones they worship to save them all. The central church was stupid to believe that they could just come in and denounce her without any resistance. It is even more stupid since they let her talk to the people. Maybe they thought her words would show that she was evil, but when they did not it would have been prudent to stop her before she riled up the peasants.
The Older Sister Maid making her speech as the Crimson Scholar in front of the peasants was necessary even if they did not know it. Before the Crimson Scholar made her speech while the people did not like what was going on they still were going to allow it to happen. The peasants, the covent, and the Winter King were all going to allow the central nations and their church push them around even though they no longer needed their support. The speech showed them that they needed to exercise their free will and not just let others tell them what to do. If the speech had not happened the people might have been pushed into a war again by the central nations without a fight. Now if the central nations want them to fight they will have to make them do it by more then just telling them to.
The merchants have brought up the Council of Ten. They did not saying specifically what it was, but it probably the power ruling over the central nations whether the government or the church is unknown. Having another power to deal with in just a few more episodes will probably be confusing. I somehow do not see a good ending for Maoyuu Maou Yuusha. It looks like there will be a lot of loose ends when the season is over.
They also brought in this blue man that thinks he is going to rule the world. Who are you blue man?