A polite, eager, 35-year-old Auroran hair cutter/clothes stylist who is attracted (serially) to lookalikes Dr. Vasilia Fastolfe/Aliena and Gladia Delmarre/Solaria, Gremionis does not, as custom expects, give up offering sex once it has been rejected. Gremionis and protagonist Elijah Baley first meet in a Community Personal, where Gremionis breaks a strong Earth taboo by speaking, insisting that he had not known about the murdered robot that Baley is investigating. Gremionis is the first Spacer that Baley has met who sports a mustache, which he compulsively strokes whenever nervous. After a full interview, Gremionis reports Baley to the Chairman of the Legislature of Aurora for slander. Only when Baley suggests the possibility that Vasilia might have subconsciously manipulated him into falling in love with Gladia does Gremionis see the possibility, and he appears to accept Baley's advice to be more forthcoming in demonstrating his intentions to Gladia. Gremionis is a virgin who wants Earth-style monogamy in his life.