*Marvin Candle is wearing a Swan lab coat, which is unusual since he is at the Barracks.
** It's not so unusual Marvin Candle is something like a "supervisor" for the Swan station, but he lives in the Barracks. Roger, for example, is a "delivery-man" that works for, at least, the Pearl station (as we know). But he wears a Swan jump suit.
***There hasn't been any evidence to suggest that Marvin Candle was something of a supervisor to the Swan station. His only link to the Swan is the Orientation film and the aforementioned lab coat. He's just as connected with the Pearl and Flame stations respectively seeing as he was in the Pearl Orientation film and the Flame computer videos.