Evan Halls it's a power user that could be classified as a "psychic", but the real nature of his powers it's still unknown. He's sustained by all the powers of other psychics not ony of his universe but from all the realities, making him an amalgamation of residual energy that can't be stopped while psychics are still existing at some reality plane.
Appearance
It (it's beyond questions like gender) often looks like an aryan man in his early 30s, always dressed with white clothes. Physically he's like a smoke-like illusion, partially vanishing in the air. It maintains this last characteristic in all forms, independently of shape, texture...
Background
Unknown. At some point of it's life took the name of a human called Evan Halls for no aparent reason, making that man dissapear from almost all realities; now that man's existence is only known by some Omnipresence users.
Powers
As an entity of residual psionic energy Evan has powerful psychic powers:
Psycho Warping: This mysterious being is able to change reality using his huge amount of psychic power. It's so powerful that can overwhelm almost all normal psionics.
Nonexistence: Because a part of it was made by pure nothingness it's able to combine his psychic abilities with this inexistent component, reaching a God-like power based on anihilation.
Freedom: Even if Evan has this ability anyone knows if it also has his own will and desires.
Psychic Power Negation: When attacked with psychic or psionic powers it'll just "eat" that energy.
Psychic Energy Physiology: Evan Halls is completely made of residual psychic energy.
Personality
None. It's always apathic, standing completely still. Some power users that saw it say that's mumbling it's own name again and again there... in the middle of nothingness...