I did say I didn't mind whether it was ASCII or not. If it wastes more space, it could be good to be more economic.
Randomized factions would be great. Here is a good structure.
Name: For werewolves, it should usually involve tribes, lunar terms or clans (One example would be The Moon of the City, or the Ninth Tribe) unless they are radical. For vampires, it should involve nobility, fancy terms for blood or fancy terms in general (Example: The Sanguine Castle) unless they are radical.
Radical: Do they want to split apart from the usual stereotypes? These would be at least far away from what you would expect from a normal clan of werewolves or vampires. (Vampire radical group: Blood Sun. Believes in saving every human and sacrificing themselves for the greater good. Werewolf radical group: Unit 7-B9. Believes that their supernatural side is merely just a tool to help them get what they want)
Strength: At it's weakest, factions have lead pipes and improvised muskets. At it's strongest, they have the police, the government and the most of the international community at their back, and their troopers are usually military supernaturals in riot armor with the best weapons. Thankfully, your city is the hometown of their faction, so if you kill the leader, the mooks usually go AWOL.
Social Standing: How the faction measures up with the others in general. Are they surrounded by enemies, or are they puppeteers of the entire supernatural community?
Humans: Do they incorporate human soldiers as easy disposable soldiers? Do they wish to see humans wiped off the Earth? Do they want to be human again?
Science: How much do they know about things? Is the only thing they know is that vampires don't like garlic and werewolves don't hang about silver, or do they know the origin, biology and weaknesses you don't even know about?
Hunters: Are they actively presued by hunters, or are they untouchable by them? Usually depends on the strength stat, but you can end up with a supernatural organization that is being targeted by an equally powerful hunter organization. Then you probably end up with a war that will shake up the entire foundations of the city.
Of course, the structure would be different for hunters.