Aleister Crowley

Aleister Crowley is the leader of Academy City, and the General Superintendent who holds power greater than that of the 12 Directors. Once the greatest magician in modern magic history, more than half of all modern Western magicians are affected by this man's established theories, and two-fifths of them are direct followers of his ways. Having stretched the boundaries of sorcery farther than the advances made in the last few millenia alone and written a top-class spellbook like "The Book of the Law", it is no surprise that many mages were outraged when this eccentric genius literally "dumped" all his magic abilities and decided to "ace it" in the field of science, thus establishing Academy City and becoming its hidden monarch.

When he chose to stop using magic and was running for his life from the entire Magic Side, he met Heaven Canceler, who eventually helped him found Academy City in a Far-Eastern island of Japan and also provides help in extending the ex-magician's lifespan for as long as possible by having all but his consciousness rely on the power of machines.

He is currently in a 'Windowless Building' that's designed to stop even a nuclear attack, and can block even Accelerator's strongest Vector Change attack he possessed as of volume 13. The building itself can even produce its own oxygen, and in volume 15 Awaki revealed it can block even radiation from space. What this implies Awaki she says she don't know, but whatever she can think off she is sure it will be wrong since there's no way Aleister would let her know everything about that place.

In the novels, his appearance is described as someone who "looks like an adult yet also a child, like a man yet also a woman, like a saint yet also a criminal". His personality is that of one that doesn't show many overt expressions, but still possesses emotions. From the various novels, but especially Volume 15, he is shown to be a master strategist, having many plans running parallel and seemingly abandoning one plan in favor of another if it fails, though the act of doing so, with the apparent disbanding of one enabling the execution of another or even the original purpose of the plan benefiting from its discontinuation, could still be a facade. Musujime Awaki once said his plans are probably beyond what anyone can think of, and even the planet might only be a resource to be used and discarded for him.

In later novels (from Volume 19 onwards) Aiwass have said Aleister's plans are starting to crack bit by bit, even with him revising the plans often to make the best of unforseen situations. This is one of the reasons Aleister have ordered the elimination of Hamazura Shiage since he defies Aleister's predictions time and again.