I think that one common character trait that is shared by more than one character is a sense of vulnerability. Blackie displays a vulnerability when he is removed from his position of power from the group. T. also displays this condition of vulnerability when his plans do not go exactly as planned when Mr. Thomas returns. For his part, Mr. Thomas displays this vulnerability when he is locked in the loo, unable to do anything about his condition, and arises from it to find his house entirely destroyed. Each of these characters share a condition of vulnerability because they are fundamentally unable to deal with the world around them. Greene develops a world in which there is no structure, and no sense of unifying principles. The hollowed out vision of the parking lot of London after the Blitz is reflective of a world in which there is no structure. Individuals have lost this, and with this loss, comes a condition of vulnerability that cannot be overcome. For many of the characters in the story, it is this state of vulnerability that ensures individuals' share a common trait of feeling lost.