FUNCTI0NSQUARE is the master of the Xarothi/FUNCTI0N. It exists in two forms; A gigantic supercomputer, one of the most powerful ones in the known Universe.

Age More than 15 billion years
Personality Dastardly, angry, evil
Allegiance Xarothi/FUNCTI0N

The other form of FUNCTI0NSQUARE is the 'vessel'. The vessel is the robotic body of the mastermind. It has a jetpack, and, unlike the rest of the FUNCTI0N, has an actual humanoid body.

The FUNCTI0NSQUARE can also convert itself into pure electricity if needbe, however it only does this when critically damaged, which only happened during the The great war.