Here is the cast page, which is accurate for Book 1. Mackenzie (I've been misspelling her name) is female, everyone else is male. Rube is Manny's brother. Praxis is Mackenzie's dice-rolling app that Mackenzie overclocked and messed with too much. The people, other than Rube, have been playing together for a while. There may or may not be something a little more going on between Mackenzie and Alex, but there aren't any other relationships.

In Book 2, Shelby Brady is introduced to play Toph. She taught Mackenzie how to play and is so good at D&D that she's banned from tournaments.

A few other people stop by to play for a session or two occasionally.