Freebooters in the Star Lanes
The Ogwai are members of other races (mostly human and elven, but including any of the intelligent mortal races) who have been modified to be mindless slaves of the Khluulu. They are all twisted and deformed, often altered in utilitarian or simply grotesque ways. Each has had one of its eyes replaced by a huge, swollen, black rubbery orb, through which its master can see and send commands. Ogwai wear roughly-made concealing robes and hoods, because their masters the Khluulu find the appearance of other races unutterably disgusting.
When not being used, Ogwai are left to their own devices, and typically simply lie down where they are and whimper until used again. They do not reproduce, and so new Ogwai must be constructed from acquired slaves.