Now that they've cleaned up the south gate, they can move on to the west gate. They've got a "positivity" , which means they can attack the other side of the wall. This is a good sign, because it means they're going to be able to use the "blasted demon" to attack them. The only problem is that they don't have a way to attack him. He's the only one who can attack him, and he doesn't know how to do it. He tells them that his vessel has already been destroyed in battle, and that his soul has granted him permission to borrow the body of the dead woman. The woman was traveling with britannia when she contracted a disease, and she was on the verge of dying. She wanted a vessel to help her fight the resurrected. They made an agreement that ludohel was living on, and so they agreed to give him a proper burial. They can't do that, because he's not a demon.