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.
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 common theme is loyalty. The sheath is often seen as being loyal to the sword, always there to protect it. For example, in many stories, the sheath will take on damage to keep the sword safe.
A 'a sword's sheath fanfic' could be about many things. It might be a story centered around a sword and its sheath in a fictional world. Maybe it focuses on the relationship between the two, like how the sheath protects the sword, or there could be some magical or special properties associated with them.
I'm sorry, I don't know the specific 'Dark Onyx Dragon Castle' story directly. It could be about a dark and mysterious castle that is home to onyx dragons. Maybe there are battles for the control of the castle, or it could be a place filled with magic and secrets.
One key element is improved efficiency. For instance, in the case of inventory management, Onyx helps customers manage their stocks more effectively. Another element is better customer understanding. When it comes to CRM, Onyx enables companies to know their customers better and thus serve them better.
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.