There's no two ways about it. He is in trouble and that is a fact. He put a layer of soul force around him because he can't rely on luck that no demon gods will have any designs for him after they sense his energy signature. Reality has proven his caution to be right and not to be overacting or baseless paranoia.
Other demon Kings can only feel a certain threat and a corrosive aura but demon gods are intimately familiar with his kind of energy. In fact, they are made of corrosive energy that will overwrite whatever it touches. So they will want to understand why he is the way he is and they will not be polite about it.
The guarantee of safety from WRATH can be subverted. After all, it is only a single demon God that invited them and made the Oat to protect them. There are 9 other demon gods here. Anything can happen so he protected himself.
