Player Mind World

This is the primary method by which the player is to gain access to the various functions related to their inventory, demons, and so forth. It is displayed as a field in itself, where you can wander around to different locations to do different things. It replaces the player menu in the vast majority of RPGs. It's split up into rooms, and the doors to those rooms are all very close to one another, radiating from the center of the mind world.