Akasha, the Root (根源, Kongen, "Radix"), is the "force" that exists at the top of all theories on dimensions. It is the Swirl of the Root (根源の渦, Kongen no Uzu, "the Vortex of Radix" in the English localization), it is a godlike entity that resides in the Akasha Stratum, and has access to the Akashic Records, which is the source of all events and phenomena in the universe. Existing outside of time, it stores and archives information of all possibilities and events, past, present, and future, of the Nasuverse.
Powers and Stats
Tier: At least 1-C, possibly far higher
Name: Akasha, "The Root of All Things", "The Root", "The Akashic Records", "The Spiral of Origin"
Age: Unknown (Exist outside of time)
Classification: Source of all events and phenomena in the universe, The "Force" of the Nasuverse
Powers and Abilities: Reality Warping, Spatial Manipulation, Time Manipulation, Information Manipulation, Causality Manipulation, Probability Manipulation, Soul Manipulation, Conceptual Manipulation, Nonexistence Manipulation, Acausality, Intangibility, Omnipresence, Omniscience.
Attack Potency: At least Complex Multiverse level, possibly far higher (Is stated to transcend all known dimensions and theories and the Nasuverse has mentioned at least 6-dimensional space, but it may be as high as our own multiverse)
Speed: Immeasurable (Exists outside of time and space; beyond the concepts of linear distances, time and speed)
Lifting Strength: Immeasurable
Striking Strength: At least Complex Multiverse level, possibly far higher
Durability: At least Complex Multiverse level, possibly far higher (Being the void that precedes all of creation makes Akasha nearly impossible to kill)
Stamina: Limitless | Unknown (Via Conceptual Destruction can literally "kill" concepts)
Range: Complex Multiversal
Standard Equipment: None
Weaknesses: None notable.
Note: Akasha has never actually appeared in any Type-Moon work to date (Only mentioned a few times). Akasha has been described to be the "force" of everything, being capable of making Shiki its own avatar and granting any of her wishes, so, is irrelevant to say that Akasha isn't a "Character", a "metaphysical location" or just the "void" surrounding the Nasuverse.