I got a lovely question in PM I wanted to address here!

"Can we reference factions other than Justice and Obsidian?"

Hell yes. 
As I just put it, Think of Justice and Obsidian as the Democratic and Republic parties. They have the most members, and therefore the most well known candidates. Media covets them more. They hate each other the most. 

[i]However[/i].

There does exist smaller, lesser known factions. You can part of more than one faction, as long as you keepnthe sane alignment for your character, unless you flip entirely. Therefore, feel free to mention a faction from your origin city or state. Justice and Obsidian are just the biggest national factions.