Soul King/Expanded Universe

The is the creator of Soul Society, the Human World and Hueco Mundo, and served as the very linchpin that sustains the three worlds until he was killed and replaced by Yhwach.

Appearance
The Soul King is humanoid in physique, with slicked-back dark hair, oval eyes and very thin eyebrows. His eyes are very unusual, consisting of four black circles which can change alignment. He does not have any arms or legs beyond short stumps. The Soul King exists within an unusual barrier that is framed on either side by bright white curtains as the focus point of a large, elegant room.

Personality
Not much is known about the Soul King's personality, or even his motivations. He seemed to greatly care about the original inhabitants of his world, killing countless Hollows to protect them regardless of the consequences.

Bleach: Can't Fear Your Own World
Millions of years prior to his death, the being that became known as the Soul King emerged from a chaotic, primordial world overrun by Hollows. To protect the original inhabitants of that world, the Soul King proceeded to annihilate all the Hollows that preyed upon them. However, these actions eventually started to destabilize the world.

In response, five powerful beings from that time decided to work together to fix everything, and for their own respective reasons, sealed an unresisting Soul King inside a crystal and used his omnipotent powers to split their world into three new ones: Soul Society, Hueco Mundo, and the Human World, and in the process created the cycle of life and death.

Despite the Soul King's lack of resistance, the five beings were unconvinced of the Soul King's cooperation and feared his immense power, and proceeded to tear off the Right Arm of Stillness and the Left Arm of Progress and tear out the Soul King's organs, leaving the Soul King trapped in an agonizing state between life and death for millions of years.

Powers & Abilities
Immense Spiritual Power: The Soul King is stated to be immensely powerful; even the likes of Ichibē Hyōsube admits that the Soul King is a nigh-omnipotent being with no equals. The Soul King's power allowed him to effortlessly destroy countless Menos-class Hollows, reducing them to mere sand.

"The Almighty": The Soul King's signature power, which granted him nigh-omnipotence and nigh-omniscience, allowing the Soul King to see all futures. Ichibē Hyōsube speculates that the Soul King had foreseen everything that happened up until his death and even allowed for it to happen.


 * World Splitting: Through the Soul King's Almighty powers, the original world that exists was split into three new ones and the cycle of life and death was created.

Ōken Bestowment: The ability to turn the bones of other beings into an Ōken. Ichibē Hyōsube believes that the Soul King's very will exists, and can be felt, in every Ōken, even his own.

Sentient Body Parts
Various parts of the Soul King have been separated from the main body and attained sentience. They each have their own names, personalities, and abilities.