I re-re did bi0, this time i think i have a stable idea of what he is and why he's the way he is.

Niguana's are a type of monster, but when a Niguana devours a human brain of the mentally ill it does something to them. It infects them and turns them into what their culture calls a true monster a shadow. Parts of their anatomy change, they grow spines on their back, their feet extend and become more digitgraded, their eyes turn pale white and their colors change to a sickly black, and they're mind deteriorates and they become mad. It is extremely rare for this to happen since the Niguana's stopped eating human flesh 200 years ago when these shadow's rose in numbers and were attacking the normal Niguana's and to stop the humans who attacked the normal Niguana's due to confusion and to protect their own.

bi0 is the only Shadowed Niguana that has been recorded, since the eating of humans was stopped, and is the most successful. He is a rather twisted individual, what is referred to as a sickness. He doesn't attack other Niguana's, but likes to pick an individual and keep following them and mentally wearing them till they eventually do themselves in. Sometimes he will also slowly feed a Niguana human brains and remains, this makes Niguana's go mad and crave human or become a Shadow of their former self and are destroyed by the tribe.

bi0 enjoys poking his head in and out around HAZARD, but enjoys her company enough to leave her be, but not without reminding her he's still around.

bi0 in reality is a representation of what goes on with me. I see shadow's out the corner of my eye, i see people that aren't really there sometimes in the corner of my eye. I hear voices and noises that aren't there. Sometimes I have to look or do a double take to make sure if it was real or I was seeing things.(all side effects from the craniotomy I had when I was 15) I ignore them and keep my mouth shut about them because, well, in society people would think I was crazy.
Sometimes he's my inner conflicts when my thoughts won't shut up during the night. Or he's that red flag that informs me something isn't right(I tend to draw him the most when i'm having an issue of some sort)

all in all, he's a shadow that haunts me.