Underman

Antagonist

Male?

Adult?

Upside-down

Hoodie, baggy jeans?

Nothing, apparently

He looks around 5'11'', maybe, it seems to fluctuate depending

Maybe he has hair? No way to tell

?

?

Seems to be just white, or maybe blue. Possibly red, or purple, or yellow or gold. Accounts vary

AltWorld

Could be very dark. All of him seems very dark. Oh, God, it's getting dark. I can't see anymore

Seems to be well-built, but not overly muscled

Is that a wisp of smoke trailing behind him? Does he have hands? He never takes them out of his...pockets? does he have pockets? What is he?

He stares at you. He sees you. He sees you. He...sees you? No. He sees you.
He wants you.

Man of respect, upright man of respect, sunrise to sunset, back and forth, either way he's there giving his sermon of death, darkness and all in between, he's the embodiment of fungus, decay, rot and dismay, maybe he has antlers, maybe he's behind you, maybe he smiled or frowned, might be right there beside you, whispering in a voice that isn't a voice at all, barely there to listen to, it's just in our head, watching you from your closet, the bottom of you bed. You're paralyzed, and he's walking towards you, strange, is he upside-down?

He'll stab you with his gaze and then you'll bleed out, he watches you for days before, slowly drawing you into his world until you're his.
He walks where no one else can, on the bottom of the bridge as you drive pass, deep in the tunnel, standing just off, in a way that you can't place. He's fast, finding you as you try to run, and the forest of fungus grows at his command, there's mold on your skin, growing through your eye, deep in the marrow of your bones. You belong to nature and rot now

Trees, that's what's behind him. Or...are they? Water, perhaps, yes, a lake.
No, no, that's not right, I don't know what it is.