Hermione would be a great addition. She could be the one who accidentally discovers their secret and then has to decide whether to keep it or tell Ron. Neville could also be involved. Maybe he stumbles upon them in the greenhouse while they're having a secret moment and he becomes their accomplice in keeping the secret.
One possible plotline could be the two of them trying to keep their relationship hidden from Ron, Ginny's brother. Since Ron is Harry's best friend, they might be worried about how he'd react. Another could be them sneaking around Hogwarts to have private moments together, like meeting in the Room of Requirement.
A popular 'Harry Ginny Dating' fanfiction is 'Love in Hogwarts'. It takes place mostly within the walls of Hogwarts and shows how their relationship blossoms in that magical setting. There are some really cute scenes where they study together in the library and share secrets. Also, 'Harry and Ginny: A Love Story' is quite good. It delves deep into their feelings for each other and how they overcome some small misunderstandings in their relationship.
It often starts with a growing attraction. Harry begins to notice Ginny in a new light, seeing her not just as Ron's sister but as a strong and independent witch. Ginny, on the other hand, has had a crush on Harry for a long time and now that they're dating, she shows him different parts of Hogwarts that he might not have known before.
The theme of redemption is quite common. Draco, especially, is often seen as a character in need of redemption in these fanfictions. His relationship with Harry becomes a way for him to redeem himself in the eyes of the wizarding world and also in his own eyes. Another theme is the power of love to change things. Their secret love has the power to change their outlooks on life, their relationships with others, and even the way the wizarding world perceives them in some cases.
One common theme is the secrecy aspect itself. Writers often explore how they keep their relationship hidden from their friends like Ron. Another theme could be the challenges they face due to the wizarding world's expectations. For example, there might be concerns about how it could affect their roles in the fight against Voldemort.
One plotline could be that they secretly married to protect Ginny from a dark wizard who has a vendetta against Harry. By being secretly married, they think they can keep Ginny out of harm's way. Another could be that they did it on a whim during a romantic getaway and then decide to keep it a secret just for a while to enjoy their private time together.
One great fanfiction could be 'Harry and Ginny's Hidden Moments in HBP'. It beautifully captures their budding relationship. The author delves into the small, sweet moments between them that were perhaps overlooked in the original book. For example, the way Ginny supports Harry during his Quidditch matches, and how Harry starts to realize his true feelings for Ginny in the midst of all the chaos in his sixth year.
They might choose to run away secretly because they want to be alone together. They are in love, and the hustle and bustle of Hogwarts life doesn't give them enough privacy. So, they run away to a quiet place where they can enjoy each other's company without any interruptions.
Well, one possible plot could be that they run away to escape some sort of dark threat at Hogwarts. Maybe a new dark wizard has emerged and they feel that the school is no longer safe. So, they secretly gather some supplies, use magic to disguise their departure, and head off to a remote location like a hidden wizarding village in the mountains. There they try to find a way to fight the threat from afar while also exploring their relationship in a more private setting.