One plot idea could be that she struggles with the family expectations of being a Malfoy while having the brave and chivalrous values of Gryffindor. Maybe she has to keep her Gryffindor identity a secret from her family at first. Another could be that she forms an unlikely friendship with a pure - blood supremacist in Slytherin and tries to change their views through her Gryffindor - influenced actions. And she might also be involved in a quest to protect Hogwarts from a dark force, using her unique position of being a Malfoy yet having Gryffindor qualities.
One idea could be a story where Scorpius discovers a long - hidden family secret that Draco has been trying to protect him from. It could involve some dark magic from their family's past.
Another plot could be that Draco's sorting into Gryffindor causes a rift in his family. His parents are disappointed, but Draco finds a new family among his Gryffindor housemates. He could also have a love interest in a Gryffindor girl, and they have to overcome the house rivalries to be together. The story could explore how Draco changes and grows in this new environment.
One idea could be that Regulus Black, despite being a Slytherin in the original story, has a secret admiration for Gryffindor values. So, in the fanfiction, he could start secretly taking part in Gryffindor - like adventures. For example, he might help Gryffindor students in a fight against some dark forces in the Forbidden Forest.
One plot idea could be that Lucius is forced to work with Hermione on a secret magical project for the Ministry. At first, they are at odds due to their different backgrounds and beliefs. But as they face various challenges together, they gradually come to understand each other. For example, they might have to deal with a powerful dark magic artifact that is causing chaos. Another idea is that in an alternate universe, Hermione is a spy in the Malfoy household and she has to pretend to befriend Lucius while secretly gathering information. This could lead to some tense and interesting interactions as Lucius is a shrewd character and Hermione has to be very careful not to be discovered.
One idea could be exploring the relationship between Draco Malfoy and his parents in a more in - depth way. Maybe showing how they influenced his actions during his time at Hogwarts. Another could be a prequel - type story about how the Malfoy family came to be so wealthy and powerful in the wizarding world. And a third could be a story where a Malfoy family member has to choose between loyalty to their family's dark past and a new path of light.
One plot idea could be that Harry discovers his heritage as the heir of Godric Gryffindor early on. This could lead to him having special powers or abilities that are associated with Gryffindor. For example, he might be able to communicate with the portraits of Gryffindor more easily and gain wisdom from them. Another idea is that there could be a hidden treasure or weapon left by Gryffindor that only his heir can find and use to defeat Voldemort. It could also involve a quest where Harry has to prove his worthiness as the heir by facing various challenges that test his Gryffindorian traits like courage, chivalry, and determination.
One idea could be Harry in Slytherin. He might struggle with the house's reputation for dark magic. He could befriend some of the more open - minded Slytherins and work to change the perception of the house from within. Another plot could be Harry in Hufflepuff, where he discovers the value of hard work and loyalty in a different way than in Gryffindor. He might also find that Hufflepuff has its own hidden strengths that he hadn't expected.
A plot could be that a Gryffindor Animagus accidentally reveals their form during a Quidditch match. This causes chaos as everyone tries to figure out who it is. It also draws the attention of the Ministry of Magic who have strict rules about unregistered Animagi. The character then has to deal with the consequences while also trying to prove they mean no harm.
One idea could be a time - travel plot where Hermione and Malfoy are sent back in time together and have to rely on each other to get back, while Harry is somehow involved in the events that led to their time - travel. Another could be a story where they are all part of a secret magical project that forces them to work together despite their differences. Malfoy might have some unique knowledge that Hermione respects, and Harry could be the mediator between their clashing personalities.
A really interesting plot could be that Draco's transformation into a girl is part of a bigger magical mystery. She starts to notice strange things happening around Hogwarts that seem related to her change. As she tries to figure out what's going on, she teams up with unlikely allies from different houses. Along the way, she also has to deal with the prejudice and confusion from some of the wizarding community who don't understand or accept her new identity.