Well, a great plot for a Royal Ward Harry Potter fanfic could involve Harry being sent to the Royal Ward for protection. While there, he uncovers a plot by dark wizards who are using the secrecy of the Ward to plan an attack on Hogwarts. He then has to use his skills and the help of new friends he makes in the Ward, like a healer - in - training who has a special gift for seeing the future through potions. They work together to stop the dark wizards and in the process, Harry learns more about his own family's connection to the Royal Ward.
Another plot could involve a member of the royal family in the Muggle world being a Squib. This person, desperate to be part of the magical world, tries to find a way to regain their magic through the help of the Potter family. The story could then revolve around the secrecy that needs to be maintained while also trying to help this person, and how it affects the relationship between the wizarding and Muggle royal families.
One idea could be the Ward Master having to deal with new and dangerous dark magic spells that are starting to seep into Hogwarts. They might have to create special wards that no one has ever thought of before to protect the students.
In a Harry Potter Royal Wedding fanfiction, it could be that the royal family is from a different magical country. The wedding is a political alliance as well as a union of love. Harry Potter is sent as an ambassador from Hogwarts. The wedding preparations could be filled with magical mishaps, like spells going wrong for the decorations. And during the wedding, a long - lost magical artifact is revealed, which has significance for both the royal family and the wizarding world at large. Harry then has to figure out how to handle this new discovery.
One idea could be that the Royal Marines are called in to help Hogwarts during a major attack. They use their military tactics along with magic to fend off the dark forces. Maybe they train the students in some non - magical combat skills too.
One idea could be that the Royal Wizards have a secret society within Hogwarts that Harry discovers. They have ancient spells and knowledge that could help him in his fight against Voldemort.
One interesting idea could be a story where the wizarding world has a royal family and they interact with Harry Potter. For example, perhaps Harry discovers he has some long - lost royal blood and has to navigate the politics of both the wizarding court and Hogwarts. Another idea might be a royal from a different magical kingdom visits Hogwarts and forms a friendship or rivalry with Harry.
In a Royal Ward Harry Potter fanfic, new characters could include a wizard named Theodore. He's from a long line of seers but his powers are different as he can see glimpses of the past that are related to the current situation in the Royal Ward. There could also be a witch named Lily (not related to Harry's mother), who is an expert in magical plants and is in the Royal Ward to study a rare plant that only grows there. And a young squib named George who has a unique ability to sense magic in objects, which proves useful when Harry is looking for a hidden magical item in the Royal Ward.
One idea could be that the maternity ward is understaffed, so the new parents have to rely on their own magic skills and the help of their friends to take care of the newborns. It could also show how different wizarding families have different traditions when it comes to childbirth, like some families might have special birth charms or potions.
Well, you could have a fanfic where Voldemort uses DND - style dark magic to open portals to other dimensions. The Order of the Phoenix has to quickly learn DND - style combat and magic rules to fight off the new threats that come through these portals. Harry could be sent on a special mission to find a DND - style mage who can teach them the counter - spells. Meanwhile, the Death Eaters are also trying to master this new form of magic for their own evil purposes. This would create a really exciting and unique story.
Perhaps a plot where the protagonist can choose to either side with the Ministry of Magic during a time of political unrest within the wizarding world or join a rebel group. This would involve different magical battles and moral dilemmas depending on the choice. In the 'harry potter cyoa fanfic', this could show different aspects of the wizarding society that we don't often see in the original books.