Lemon could be involved in a mystery at Hogwarts. For instance, she might notice some strange happenings in the restricted section of the library. Since house - elves can move around unnoticed, she starts to investigate. As she delves deeper, she realizes it has something to do with an old, forgotten magic that was once banned in the wizarding world.
A plot could revolve around Lemon's relationship with a particular character in the Harry Potter universe. Let's say she forms a bond with Neville Longbottom. Neville, being kind - hearted, treats Lemon with respect. She, in turn, helps Neville with his herbology projects by using her house - elf magic to make the plants grow better. Their friendship could face challenges when some of the other students start to suspect that Lemon is giving Neville an unfair advantage.
The fanfiction could focus on Lemon's backstory. Maybe she was once a part of a different wizarding family before coming to Hogwarts. And in this new environment, she has to adjust to the different dynamics among the other house - elves and the wizards and witches in the castle. She could be facing some discrimination from the other house - elves for being too friendly with the students.
Maybe Harry Potter, as a female, could start to understand the struggles of house elves deeply. She might use her magic to try and improve their living conditions, like Hermione did with the 'Society for the Promotion of Elfish Welfare'. She could also form unique friendships with some house elves, leading to adventures within Hogwarts and beyond as they work together to change the traditional views of house elves in the wizarding world.
The plot could involve Petunia using her witch powers to protect Harry from the Dursleys' abuse. She realizes that she has a responsibility towards her sister's son and uses her magic to create a safe haven for him within the Dursley household. This would be a big change from her original character who was so against magic.
One possible plot could be that the female cat Lemon has some sort of magical ability. In the wizarding world of Harry Potter, perhaps Lemon can communicate with wizards. She might help Harry in one of his adventures, like finding a hidden passage in Hogwarts. For example, when Harry is on the hunt for Horcruxes, Lemon could use her acute sense of smell to detect a hidden Horcrux location that the others have overlooked.
Well, perhaps Harry could start seeing the world from the house - elves' perspective. He might use his magic in new ways to improve their living conditions. For example, he could secretly create better living quarters for them in Hogwarts. He might also try to teach them some basic self - defense magic so they can protect themselves from the meaner wizards.
She could be on a quest to clear her father's name. Since Sirius was wrongly accused of many things, she might dig into the past, find evidence that he was innocent all along. For instance, she could discover hidden letters or witnesses that were overlooked. This would lead her into many dangerous situations as there are those who would rather keep the truth buried.
Perhaps Fleur Delacour's sister is an exchange student from Beauxbatons to Hogwarts for a special program. She arrives with high expectations but is met with some resistance from the Hogwarts students who are a bit jealous of her connection to Fleur. However, she quickly proves herself by being extremely talented in a different area of magic, like potion - making. She then enters the Triwizard Tournament as an honorary contestant (due to some special rule) and has to face various challenges, all while trying to make friends and fit in at Hogwarts.
A 'Harry Potter is an elf fanfiction' could have a plot where Harry's elven side is awakened. He starts to have an affinity for nature and elven magic. This newfound power attracts the attention of both good and bad forces. The good forces might want to help him control and use it for the greater good, while the bad forces, like Voldemort, see it as a threat. Harry then has to learn about his elven heritage, the history of elves in the wizarding world, and how to use his new powers to defeat Voldemort. He might also have to deal with the fact that some elves in the wizarding world see him as an outsider, as he was raised as a human wizard, not an elf.
One potential problem is that it may go against the family - friendly nature of the original Harry Potter series. The series is loved by people of all ages, and this type of fanfiction with 'lemon' elements can be inappropriate for younger fans. Another issue is that it might not be in line with the intended characterizations of the house elves in the original work. House elves are often portrayed as a subservient but important part of the wizarding world, and this type of fanfiction could distort that view.
The plot could involve a wand that has a special mark on it. The main character finds it in Knockturn Alley and realizes it's different from other wands. It might be a wand that was once owned by a powerful dark wizard. The character then has to decide whether to keep it and try to use it for good or get rid of it to avoid the potential danger it brings.