A common theme is the development of their relationship. Since they have a unique dynamic in the original story, fanfiction often explores how that relationship grows and changes.
Well, one interesting aspect could be the unique character interpretations. In fanfics, authors often explore different sides of Lisa Lisa that might not be fully shown in the original work. It could also be interesting to see how the lemon aspect, which might imply some sort of romantic or spicy elements, is incorporated into the story in a creative way.
It's also possible that Lisa Davies is a transfer student from a different wizarding school. Her arrival at Hogwarts could stir up things as she brings with her different magical traditions and knowledge, which then affects the way the Hogwarts students view magic.
Since we don't have a clear understanding of what exactly these 'lisa lisa celebrity ghost stories' are, it could potentially be a new or emerging trend in the world of celebrity gossip or horror - themed entertainment. It might be a story that started on social media, where someone claimed to have a connection to Lisa Lisa and told a ghost - related story about her. Or perhaps it's a part of a local or niche sub - culture's lore that is slowly starting to gain more attention.
It could be about Lisa Lisa seeing a ghost backstage during one of her shows. Maybe she heard strange noises or saw a figure that couldn't be explained.
As I don't know the 'Ray Boundy story', I can't say who Ray Boundy is in it. He could be the main character, a hero or just an ordinary person around whom the story revolves.
Another theory is that it might be a composite of several different women. However, historical evidence mostly points towards Lisa Gherardini. She lived in the same time and place as Leonardo da Vinci, and the connection through her husband's commission is a significant factor.
To write a good 'lisa lisa lemon fanfic', you need to have a clear plot in mind. It should not just be about the lemon elements but also have a strong story arc. Develop the characters, especially Lisa Lisa, in a way that is believable. For example, if she's in a romantic situation, show how she would realistically react. Also, use vivid descriptions to bring the story to life, whether it's the setting or the emotions of the characters.