XIII機関
Each Kingdom Hearts takes different shapes depending on from which hearts they are created. The first game's Kingdom Hearts, artificially created from the hearts of worlds, has the appearance of a sphere of light beyond a white door. The Kingdom Hearts made by Organization XIII, on the other hand, takes the form of a yellow heart-shaped moon. The authentic Kingdom Hearts called upon by the χ-blade is depicted as a blue heart-shaped moon in "Birth by Sleep" and yellow in "Kingdom Hearts III".