And can't he create a magical contract? That will just protect the one who sign it from not divulging the information being willingly or unwillingly to others or being influence our mind read or mind controld/charm. I don't think anyone who will join his party will mine signing this contract. If they are sincere enough. And can he merge some of hestia divinity/Arcanum To their house to protect it from prying eyes and from Intruders. And if he gave the teleportation pass to hestia and Fina.They can just teleport back when they feel that they are in danger. This will solve there safety problem.