Charlie is not a very loyal person, content to play just about all sides so that he ends up the winner. However, to protect Charlescomm's reputation, he does not break alliances outright, waiting until alliances are broken to switch sides.
Charlie also seems to be the only character not confused by Parsons use of online chat lingo in eyebook messages.
Real World References
Charlie and Charlie's Archons are references to a television series Charlie's Angels featuring 3 young women working as private investigators for their boss, Charlie, whose face is never seen on screen. If this homage continues, we will never see Charlie's face, though we may catch sight of extremities or a silhouette.