There could be various fanfictions. Maybe some that focus on alternative endings, like ones where certain characters survive who didn't in the original. For example, a fanfiction where Erwin survives and leads the Scouts in a different way.
One way is to check on popular fanfiction websites. Look for ones with high ratings and a lot of reviews. For example, Archive of Our Own (AO3) has a large collection of AOT fanfictions. You can search for the most popular ones there.
I'm not sure who exactly Charles Falco is without more context. There could be many people named Charles Falco. Maybe he's a local figure in a specific community, an artist, or someone involved in a particular event.
Definitely not. AOT is a work of fiction that combines elements of fantasy, action, and drama. It's set in a made-up world with its own unique plot and characters.
The AOT manga has finished. It wrapped up all the major plotlines and provided a conclusion to the story that fans have been following for a long time.
The AOT manga has indeed come to an end. The story concluded with the last chapter, bringing closure to the series. However, fans' reactions to the ending have been quite diverse.
Not necessarily. While AOT is highly popular and has many merits, whether it's peak fiction varies from person to person. Different people have different standards and preferences for what constitutes peak fiction.