It's fairly common. Fans often look for more content related to their favorite shows. Since 'Attack on Titan' has a large and passionate fan base, there are a lot of fanfics available. 'Aot' fans might watch (read) these fanfics to explore different scenarios that the official story didn't cover. For example, they might want to see how a certain character would react in a different situation or what would happen if a major plot event had a different outcome.
One interesting grisha fanfiction could be about a grisha with a unique power that wasn't explored in the original series. For example, a grisha who can manipulate time on a small scale. This could lead to all sorts of adventures and challenges as they try to keep their power a secret while also using it to help their friends.
Love is also a common theme. Sometimes it's a love between two Grisha, and other times it's a love that crosses the boundary between Grisha and non - Grisha. For instance, a story might show how a Grisha falls in love with a normal person and has to deal with the differences. Additionally, the theme of survival is prominent. Given that Grisha are often in a dangerous world, they have to fight for their survival, both from physical threats and from those who fear their power.
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.
You can start by looking on popular fanfiction websites such as Archive of Our Own. There, you can simply search for 'grisha' and a whole list of fanfictions will come up. You can then sort them by popularity, rating or length to find ones that might interest you.
It could mean that a person who is a fan of 'Attack on Titan' (AOT) is reading or watching fan - created fictional works related to AOT. Maybe they are interested in seeing different interpretations or storylines that fans have come up with.
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.
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.