Commander no. 3

The Third Commander is one of the three duohumans  ranked in the 99th percentile of power, as well as one of the three commanders of Heroes United and one of the 25 duohumans that participated in the creation of the planet of Osrisis. While the Third appears to be a blank slate, and lacks reactions to non-threatening events that occur in his vicinity, various scans of his nervous system, partiularly his brain, have shown a surprisingly high amount of brain activity in nearly all centers.

History
Strangely, no evidence of the Third's existence has been found that predates his meeting with those who would eventually become the first and second Commanders of HU, heading COM. His name is an unknown factor, as he has never mentioned it nor has any record of it ever been found. All of the Third's history is in the five hundred or so years since the First Meeting, between the three Commanders. The only response to external stimuli that has been observed so far is when the Third is exposed to a combat situation, in which he reacts to fight and eliminate threats. As such, the Third is more useful as a tool or a weapon than a tactical commander or leader: it follows that his place as the Third Commander is less due to his leadership or command ability, and more to do with the simple fact that his power matches that of the First and Second Commanders.

Alternate HU
The most hints of the identity, personality and history of the Third have originated in the alternate HU accidentally discovered by Wanderer.

After the disappearance of Elexion in this alternate timeline, and the deaths of Wanderer, Jesse Knight and Camolot the Creator, the Third appears to have taken the reigns of what is left of HU in order to continue to resist INFINYTUM. However, it appears that the Third is now vulnerable to moments of instability and madness, though in order to control these bouts he has sealed himself in a vessel, itself contained within the mantle of a dead world.

Wanderer has sub-sequentially theorized that the Third's overtly antisocial, nigh-autistic behaviors are a conscious limiting device, purposefully containing his moments of madness and destructive tendencies with complete introspection and lack of emotion. In this way, the Third has contained himself in a thought-based sensory deprivation tank, blocking out all external stimuli in order to eliminate triggers for erratic or destructive behavior entirely. Even his combat mode is an instinctive self-preservation measure rising out of the fight-or-flight reaction.