Mental World

The Mental world is a non-existent location found in anything that possesses aether or yoki and isn't found in normal humans. According to Aezathol, the mental world is the representation of all the seasoning a being has that has been engraved into its soul and yoki. The world is unique to each individual (as it is a reflection of their soul) and its size is proportionate to the owner's power. Seen outside from the void/dark abyss, these worlds appear as lights, or other sensations for those more attuned. Inside this world, the individual's soul and mind resides as its bodily appearance. For claymores and awakened, the form they take is usually the one they recognize themselves to be in the real world. The inside of the mental image contains the soul and yoki. Contained within the physical representation of the soul is the user's yoki or aether which can either be stored inside the user (being forced in the case of claymores) or be combined with its user's soul (as an armor for both THUMA users and awakened (and all other angels)). When Grace absorbs this armor, she gains seasoning. The skin of the mental image is the mind, and sometimes, it is covered in an armor of yoki if the user is awakened. If Grace chooses to absorb the soul, she also gets the mind. The world itself is the body of the user, particularly, the seasoning done to change the body into what the mind and soul wish.

The world itself is also related to the red world/crimson world/bloodmist borderlands. As the mental world exists only as a location in the Void, and the yoki-user exists inside reality, there exists a point where reality begins to fade into Void as the user tries to enter the void itself. This world is the red world, shaped nightmarishly by the user's mental world. The red world is seen when the yoki-user is observing both the real world and the void at the same time and the two sensory inputs are combining to form a red-world (red due to it being between Void and flesh (which itself, is composed of small biological fragments, colored red by blood). This world is seen upon Awakening and during Blood Mist.  Beings with greater yoki perception can look through their red/mental world and enter the The Dark Abyss.

Here is the order of appearance between the worlds:
 * 1) Reality
 * 2) Red World - The Mental World Mixed with reality
 * 3) The Mental World- A personalized world of yoki, seen as a light by observers looking at the yoki from the Dark Abyss.
 * 4) The Dark Abyss-the void itself.