Eniac

Eniac is a villain first noticed by the public in 1943 whose current status is a sometimes debated topic to this day.

Appearance
There are no witnesses to descibe Eniac's current appearance (as no one has seen him in decades) but old accounts tell that he was an extremely old looking man hardly resembling a human being, his wrinkly skin drooping from his face, neck and all limbs.

Career
There are rumors that Eniac was hospitalized the first couple of decades of his life due to a rare disorder that prevented all of his automatic brain functions such as breathing, initiating chemical reactions and so on from happening. With the help of mecidine that even by modern standards could be considered outlandishly complex, he managed to survive long enough until he learned to control all of those functions himself, no longer needing 24/7 life support.

It is unknown when Eniac began his career as a villain, however the was first notified of his existence in 1943 after one of Eniac's henchmen decided to blow a whistle on his secret operations for an unknown reason (he suicided right after delivering the message to the public).

There are very few accounts of Eniac appearing in person, however when he did (in 1948, 1955 and 1963) he was surrounded by a large team of henchmen protecting him closely.

He's suspected to be the mastermind between many terrorist attacks and war conflicts between various smaller countries.

Many believe he put in a lot of effort to prevent the forming of New Brazil, possibly one of his known failures.

It is unknown whether Eniac is alive or not. Many want to believe that he died of old age, however the less optimistic people speculate that he no longer appears on the front lines because of better telecommunication technologies having been developed, removing the need to oversee the most important missions personally for on the spot strategizing.

Powers
Eniac has the power of super fast thought and 100% manual control of his brain. His brain seems to be imprevious to natural neuron loss. This power manifests itself in many ways:
 * Eniac never sleeps. Every third of a very small fraction of a second, Eniac runs a resting "program" through his body, essentially "sleeping" 8 hours a day. Right after ending parts of such a cycle his brain goes through an algorithm that predicts anything he could've missed during that time with 98.8% accuracy;
 * Eniac ages very slowly. Parts of his brain constantly combat the process of aging, directing chemicals and nutrients into various parts of his body that require it the most.
 * Eniac is super intelligent. Decades of constant brain use have made him super efficient at it, in critical cases letting him think of an unfathomable amount of various outcomes and subjects.