Well, infamous fanfiction is basically fan - made stories that are known for being bad in some way. It could be that they break the unwritten rules of the fandom. Maybe they rewrite the characters in a completely wrong way, like making a heroic character into a villain for no good reason. It can also be due to the author's behavior. For instance, if an author is known for plagiarizing other fanfictions or being rude to readers, their works can become infamous.
The story of Infamous 2 follows Cole MacGrath. He has powers and is on a journey to become more powerful to face new threats. He travels to a new city, New Marais, which is filled with all sorts of challenges. There are different factions in the city, some support him and some are against him. Cole has to make choices throughout the game that affect his powers and how the story unfolds.
I think it's more of a fictional creation. While some stories draw inspiration from real life, this one might have just taken a few concepts and built a fictional plot around them in 2020.
Most probably not. Usually, works labeled as 'Infamous' are fictional, crafted by the imagination of the creators rather than being rooted in real events.
Another theme is her relationships, be it with friends, foes or potential love interests. Fanfic writers often use these relationships to develop her character further. For example, in some fanfics, her relationship with a certain character might lead to her changing her views on things. And this makes for an interesting read as you see her character evolving through these interactions.
Well, Augustine himself is surely one of the main characters. He is the central figure around which the story revolves. There might also be his friends or colleagues who influenced his thinking or were part of his life journey. Maybe there are some religious figures like bishops or priests who interacted with him and played important roles in his spiritual development.