Well, a common plotline in Harry Potter inquisitor fanfiction is the Inquisitor investigating a new dark magic threat. This could involve a mysterious group of dark wizards operating in the shadows, and the Inquisitor has to use their skills and knowledge to uncover their plans. Sometimes, the Inquisitor might also have to deal with internal politics within the Ministry of Magic while trying to solve the case, adding an extra layer of complexity to the story.
One interesting plot could be the High Inquisitor imposing new and strange rules in Hogwarts, which the students have to find creative ways to get around. For example, they might secretly hold study groups for spells that are deemed 'dangerous' by the High Inquisitor.
Well, you could have a plot where the Inquisitor is tasked with investigating a series of strange disappearances at Hogwarts. As they dig deeper, they discover that there is a secret passageway that leads to an old, forgotten part of the castle. In this part, there is an ancient magic that is being misused by a group of students who have been influenced by a dark wizard from the past. The Inquisitor then has to decide how to handle the situation without causing panic among the students and faculty. They might also have to work with some unexpected allies, like Hagrid, who knows a lot about the hidden parts of Hogwarts.
A possible character for the High Inquisitor could be a long - lost relative of Dolores Umbridge. They might share her strict and often cruel approach to discipline. This character could have been in hiding for years, secretly observing Hogwarts from afar and waiting for the right moment to impose their own version of order.
Well, some might involve magical creatures with furry characteristics in new adventures at Hogwarts. For example, a werewolf character could have a unique story arc that intersects with the main Harry Potter plot. Maybe they are trying to find a cure or dealing with the prejudice within the wizarding world in a different way than what's in the original books.
One possible plotline could be a comical take on baby Harry's magical mishaps. Maybe he accidentally makes his diapers levitate or turns his crib into a mini Hogwarts. Another could be about how the other characters like Hagrid or Dumbledore interact with baby Harry in this unique situation, perhaps trying to figure out how to handle his early magical outbursts while he's still in diapers.
Perhaps a plotline where the ogre has some sort of special power that the wizards in Harry Potter are interested in. This could lead to a whole series of events where they try to either control or cooperate with the ogre.
In some fanfiction, a familiar might get lost in a different dimension. So, the main character has to go on a journey to find it. Along the way, they meet strange new creatures and learn new spells, which is really exciting. It also shows a different side of the bond between a wizard and their familiar.
There could also be a fanfiction where a member of the Sacred 28 discovers a long - lost family secret that has the potential to change the power dynamics among the pure - blood families. This secret could be related to a hidden magic or a forgotten alliance, and as they try to uncover more about it, they face opposition from other families who fear the change it might bring.
A common plotline is the characters' post - graduation plans. Some fanfictions might explore how Harry, Hermione, and Ron decide on their career paths. Maybe Harry is conflicted between becoming an Auror or a teacher at Hogwarts. Hermione could be considering further studies in ancient magic, and Ron might be thinking about joining his brothers in the joke shop business. This exploration of their future dreams and how they support each other during this transition period can be really engaging.
One possible plotline could be that Harry is wrongly expelled due to false accusations by a dark wizard who has infiltrated Hogwarts. Harry then has to prove his innocence while on the run from the Ministry. Another plotline might involve Harry being expelled because of a new, strict and unjust headmaster who has a vendetta against him. He could then start his own school for outcast witches and wizards.