One common theme is friendship development. Given their different backgrounds and personalities, stories often explore how they become friends. For example, Denji's more straightforward and sometimes naive nature might contrast with Kobeni's more timid and cautious self, and the fanfic could show how they bridge that gap.
Sure. You can start by looking on fanfiction.net. There are often a variety of fanfics featuring this pairing. Some might focus on their adventures together in the unique world they are from, exploring how their different personalities interact and complement each other during battles or in day - to - day situations.
It's hard to say for sure. Sometimes these things depend on various factors like the creator's schedule or the production process. Best to stay tuned for updates from reliable sources.
Yes. But it's been a bit controversial as some fans felt the ending was rushed or didn't meet their expectations. However, it's still a completed series.
I don't have the specific number off the top of my head. But you can try searching on popular manga platforms or asking manga enthusiasts in online communities. They might be able to give you a more precise count.