How about a story where a powerful dark force is threatening both the wizarding world and the demigod world? Percy and Ginny are brought together by a prophecy that says they are the key to stopping this threat. They embark on a journey to find ancient artifacts from both worlds that can be used to defeat the dark force. During their journey, they learn about each other's strengths and weaknesses and form a strong friendship.
Common themes include cross - universe cooperation. As they are from different fictional universes, they have to figure out how to work together. There's also the theme of power dynamics. Percy has his demigod powers and Ginny her magic, and how these interact and who is more powerful in different situations is often explored. Additionally, the theme of identity is present. They both have strong identities within their own worlds, and seeing how those identities change or are strengthened when they interact is a common element in this type of fanfiction.
One plot idea could be that Arthur discovers Ginny has a special magical talent that she's been hiding out of fear. He then helps her gain confidence in using it. For example, it could be a unique form of wandless magic. Another idea is that they go on a magical adventure together, like exploring an ancient, forgotten wizarding site. There, they encounter strange magical creatures and have to use their combined knowledge and skills to get out safely.
A third plot could be a story set during a big wizarding festival. Ginny and Bill are both involved in the preparations, but things start to go wrong. They must work together to fix the problems and save the festival. During this time, they might also have to deal with family drama as other Weasleys get involved, and through it all, their bond as siblings - in - law (or just as Weasleys) becomes stronger.
Yes, there are many. You can search on fanfiction websites like Archive of Our Own. Look for tags that focus on friendship or adventure between the two characters. For example, some fanfics might explore Percy and Ginny teaming up to solve a mystery in the wizarding and demigod worlds combined, which would be a great non - lemon story.
Another plot could be that Percy and Thalia get trapped in a magical realm that is a mix of their worst nightmares. In order to escape, they have to face their fears head - on. This forces them to open up to each other about their insecurities and past traumas. As they work together to find a way out, their bond grows stronger. They might also meet some strange creatures in this realm that give them clues about how to break free, and they have to use their wits and powers to decipher these clues.
Here's a plot idea. Ginny becomes an Auror and is assigned to keep an eye on Draco who is still under some suspicion post - war. But as she observes him, she realizes he's not the same person he was. This leads to a series of interactions where they start to develop feelings. Another could be a story where Draco discovers a dark secret about Ginny's family that she doesn't know. He has to decide whether to use it against her or help her. And a third idea is a fanfic where they are both chosen for a special magical quest that only they can complete together, and during the quest, their relationship blossoms.
One plot idea could be that the reader is a new student at Hogwarts who is having trouble fitting in. Ginny takes the reader under her wing and shows them around. As they spend more time together, they develop a strong bond. Another could be that the reader has a special magical ability that only Ginny seems to understand, and they have to work together to figure out its origin and how to use it for good.
One idea could be Percy trying to understand the twins' pranks and finally joining in on one. Another could be the twins getting Percy to loosen up during a stressful time at Hogwarts, like exam week. Maybe they play a prank that backfires and Percy has to help them fix it without getting in trouble with the professors.
One idea could be Percy being sorted into Slytherin instead of Gryffindor and how that changes his relationships with his family. For example, he might have a more strained relationship with his Gryffindor siblings at first. Another plot could be Percy using his Slytherin cunning to outwit his political rivals in the Ministry of Magic later in life. Or perhaps a plot where Percy has to team up with some Slytherin students to solve a mystery that the Gryffindors are too head - strong to figure out.
Another plot could involve Percy being assigned to work with Hermione on a top - secret project at Hogwarts. Maybe it has something to do with protecting ancient magic texts. Along the way, they learn to respect each other's different approaches and form an unlikely friendship.