The Organian council member and Isis really were great guesses. The security guard posted outside the brig "watching" Gary Seven? Seven incapacitates him with the Servo, inducing a soporific state and a goofy smile. One of the unwritten rules of that job would probably be not to speak or smile, but he does the latter "[d]espite the occasion" (which sounds negative) of losing control of the prisoner. And he did spend a brief amount of time with the mystery character of the week.