Colin

Colin is a middle-aged Englishman of some means, though clearly not overly wealthy, on vacation in a city that appears to be Venice with his partner of seven years, Mary. It is generally agreed that Colin is exceptionally attractive, though not in a typically masculine way. He is referred to as "beautiful"; and descriptions of him center on his fair skin, almost childlike body, and dark, angelic curls. His personality is ambivalent, making him easy prey to someone like Robert. Colin goes along with whatever flow Robert creates, even when it goes against his own better judgment. He does, however, sacrifice his own life to save Mary's, possibly redeeming his earlier weaknesses. This, too, could be a sign of weakness, though, because to let himself be killed is - at that moment - the path of least resistance.

Mary

Mary, like Colin, is middle-aged and upper middle class...