Elio "Cohen" Casti is a soundman working for UN Public Broadcasting.
He is blind, and always wears opaque black glasses. He has short white hair.
Cohen was on the streamcast team of Monica Stuart when she produced the documentary on the crew of the Rocinante. Cohen was secretly a mole, installing a backdoor in the Roci's computer systems on a contract for Melba. Cohen realizes that he's been deceived and betrayed when Melba's plot unfolds and it puts him in the line of fire.