A powerful vampire lord could be the main antagonist. This vampire lord could be ruling over a hidden vampire society and sees Lupin as a threat to his power, especially if Lupin is starting to gain vampire - like abilities.
Another theme is the idea of redemption or change. Some fanfics explore the possibility of Lupin turning over a new leaf, or Zenigata realizing that there's more to Lupin than just being a criminal. This can lead to some really interesting character development.
One idea could be that Lupin discovers he has a vampire ancestor and starts to develop some vampire - like abilities which he has to learn to control while on a heist. Another could be Lupin teaming up with a vampire hunter to steal a powerful vampire - related artifact from a group of evil vampires.
One popular lupin the 3rd x zenigata fanfic is 'The Unending Chase'. It delves deep into the complex relationship between Lupin and Zenigata. In this fic, their cat - and - mouse dynamic takes on new dimensions as they are forced to work together in an unexpected situation. It's full of action and some really interesting character interactions.
The common themes for 3rd graders' stories are often about friendship, adventure, and learning new things. Simple and fun ideas that kids can relate to easily.
I'm not sure specifically as I haven't read it, but it might be about exploration beyond Earth, like adventures in space, encounters with alien species or the challenges of colonizing other planets.
One possibility in such a fanfiction could be that the age difference between Remus and Hermione creates a complex dynamic. However, their shared love for knowledge and their kind hearts could be the initial attractions. For example, they might bond over a particularly difficult spell or a piece of magical history that others overlook.
Well, 'Moonlit Love' is a really nice Tonks and Lupin love fanfiction. It has a great plot where their love is tested by the prejudices in the wizarding community against werewolves. It shows how they overcome these obstacles together. Then there's 'Love in the Shadows' which gives a more in - depth look at Lupin's insecurities regarding his condition and how Tonks helps him get past them. And 'Eternal Love: Tonks and Lupin' is also a good one, it has a bit of a tragic undertone that makes their love seem even more poignant.
It has a certain following. The idea of these two characters mating in fanfiction can bring out different aspects of the Harry Potter universe. For example, it could involve Lupin sharing his knowledge of the wizarding world's history with Hermione in a more intimate way. Also, it might show how Hermione's intelligence could help Lupin in dealing with his own inner demons, like his lycanthropy. It offers a fresh perspective on both characters that fans enjoy exploring.