Another popular trope is the 'forbidden love' aspect. Given William's position in the reaper world and the rules that govern it, a relationship with a regular human or an unruly reaper (the reader) could be seen as against the rules. This adds an element of tension and drama to the story.
The 'protector' trope also often appears. William, with his skills and knowledge, may end up protecting the reader from various threats in the reaper world, such as rogue reapers or dangerous supernatural entities. This trope helps to build a sense of closeness and trust between the two characters.
In such fanfictions, the relationship between William and the reader might often involve a power dynamic. William, being a high - ranking reaper, has authority and knowledge that the reader may lack. This can lead to a relationship that is both unequal and yet full of potential for growth and mutual understanding. For example, the reader could be a new reaper or someone from the human world who gets involved with William's reaper duties.
The 'lemon' part might suggest some mature or romantic themes, but without reading it, it's hard to say exactly how it's incorporated. It could be that the story uses these themes to enhance the relationship between William T Spears and the OC, perhaps through passionate encounters or deep emotional bonds that are expressed in a more sensual way. However, this is just speculation.
In this fanfiction, William Spears is likely a new character created by the author. He is someone with the power or ability to save Harry Potter, so he might be a very powerful wizard or have some extraordinary qualities.
One popular trope is the 'Forced Proximity'. For example, Masky and the reader might be trapped in a small space together, which forces them to interact and get to know each other on a deeper level. Another is the 'Mysterious Protector' trope, where Masky secretly looks out for the reader, and the reader gradually discovers this. It adds an element of mystery and intrigue to the story.
The 'redemption' trope can also be found in vanitas x reader fanfiction. The idea that the reader might be the one to bring out the better side of Vanitas. Or the 'shared destiny' trope, where the two are fated to be together for some grand purpose. These tropes add depth and interest to the fanfiction stories.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions, and you're likely to find quite a few stories about William T Spears x OC there.
One great story could be 'The Unlikely Bond'. In it, the OC character has a unique connection with William T Spears that develops slowly over time. It shows their interactions in the afterlife office setting in a really interesting way.
Another possible appeal is the exploration of relationships. In this fanfiction, the relationship between William T Spears and the OC can be explored in depth. The 'lemon' element could be used to show a deeper connection between them, not just on a physical level but also emotionally. It can make the readers root for the couple, or at least be very interested in seeing how their relationship unfolds, whether it's a happy - ever - after kind of story or a more complex, angsty relationship.
Well, a common trope is the 'roommate' situation. In reader x reader fanfiction, it can lead to a lot of fun and sometimes awkward moments as the two readers live together. There's also the 'fake relationship' trope. They might pretend to be in a relationship for some external reason, like to make someone else jealous or to get into an exclusive event. And the 'reunited after years' trope is also seen often, where the two readers meet again after a long time apart and old feelings resurface.
A popular trope is the 'fish out of water' situation for the reader in Professor Venomous' world. The reader is often an ordinary person thrust into the extraordinary and dangerous world of Professor Venomous. This creates a contrast and opportunities for growth and interesting interactions. Also, the 'forced proximity' trope is common, like they are stuck together in a certain situation which forces them to confront their feelings for each other.