This is quite a riddle. Since there are no more hints to its solution, i guess that it is concerning a person or group of persons who have more background information.
The figure veiled in black seems to stare out from under the blackness of the shadows cast by its hood. A cold stare of its eyes scan down the length of the writing on the parchment. It turns to walk away again, and smirks to itself with a hushed hiss and murmur:
"Have fun."
He is human, Kasume. Aristeaus suggested him as well yesterday. Still he is human and that does not fit. I would like to talk to you, Damien, since you know the group which this riddle refers to and have more background information to get a clue of some other details.