Proof of Existence is a room in the Castle That Never Was. The room is characterized with panels on the floor representing the members of Organization XIII (excluding Xemnas and Xion), indicating their title, weapon, and rank by going from left to right. The panels of the Organization members who had died were colored red and damaged, but have been restored over time. When an Organization member dies, their panel turns red and becomes damaged. However, as long as the members live, their panels remain blue and are generally in great condition.