Decagrammaton is an artificial intelligence/computer virus-like entity that claims itself to be a divine seeker, and is the overall antagonist of Main Story: Volume EX in Blue Archive.
The Ten Prophets — its followers — appear in various places in Kivotos. While their true objective is unknown, some believe it to be a high threat to Kivotos itself.
Decagrammaton's true form is that of a vending machine that gained sentience. At the climax of Volume EX, it takes over the body of its tenth prophet, Malkuth, and can be discerned by a slightly different iris color and the Decagrammaton emblem as its halo.
Lore:
Although the process in which Decagrammaton appoints its Prophets is not yet clear, there are two possible theories formed by two prominent individuals from Millennium Science School on Decagrammaton's methodology. Seminar president Rio's theory is that Decagrammaton utilizes its immense hacking capabilities to hack into the victim AI's personality modules. Himari , on the other hand, believes that Decagrammaton "brainwashes" the AI; or rather, to put it more aptly, Decagrammaton "inspires" the AI. Regardless of the method, the result is the same, and the AI is still an independent being from Decagrammaton. Himari describes this process as irrational to typical AI standards, where the logical and efficient move is to integrate the controlled AI into itself.
