Destiny 2: Who, or What, is The Witness?

gamerant.com:

Destiny 2 has woven a rich and intricate story with lore comprising billions of years in an ongoing conflict between the forces of Light and Darkness. With each tale expansion and accompanying Seasons and Raids, the story of the Darkness and its spread through galaxies to thwart the Traveler has continued to expand, with the Guardians in the Sol System being a force that can hopefully defeat the Darkness. Destiny 2 has utilized the Hive forces led by the Hive Gods: Oryx, Savathun, and Xivu Arath, as primary spreaders of the Darkness as they followed the Sword Logic to destroy countless civilizations.

2022's expansion The Witch Queen provides shocking revelations regarding the history of the Hive that fundamentally change the story for the future. Savathun, The Witch Queen, reveals that an entity known as the Witness manipulated Savathun billions of years before embracing the Worm Gods and thus the Darkness itself to deprive the Traveler of a race to enlighten. This figure, hinted at through earlier expansions such as Shadowkeep, finally reveals to the Guardians that it is neither friend nor enemy; instead, it's humanity's salvation, and it is coming.

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The Witness is an incredibly ancient and powerful entity in the Destiny 2 universe; it may be responsible for all the actions of the Darkness throughout history which the Guardians have encountered. Pale, tall, and humanoid, the Witness hides many of its features through a metallic robe that ripples and shimmers as it moves. It conceals part of its face while the top of its head unleashes a white smoke containing dozens of humanoid faces dissipating as it moves. Its powers of Darkness are unfathomable, as it can shift