In English: a shady character.

你在说Dark吗？lol

I think "he/she is an evil person/guy" is near to the right answer ,if you can tell us the whole sentence ,i think i can help you clearly .

"man from darkness"is literally translate,it's usually means that individual character is bad or people very sinister.

I guess it is evil person. Perhaps it will be easier to understand the word if you tell us the complete sentence.