One interesting plotline could be Hermione's discovery of new spells related to the Half - Blood Prince's notes that she uses to outwit the Death Eaters. For example, she might find a unique defensive spell that saves her friends during a battle.
One interesting plotline could be Hermione's discovery of a hidden spell in the Half - Blood Prince's book that she uses to protect Harry in a dangerous situation. For example, she might find a spell that creates an impenetrable shield around them when they are attacked by Death Eaters.
One interesting plotline could be Ginny's struggle with her feelings for Harry during the events of the Half - Blood Prince. She might be torn between her own desires and the chaos that surrounds them at Hogwarts. Another could be how Harry and Ginny deal with the secrets they discover about the Half - Blood Prince's past and how it impacts their relationship.
One interesting plotline could be Harry delving deeper into the secrets left by the Half - Blood Prince. Maybe he discovers more advanced spells that help him in his battles against Voldemort. Another could be his exploration of the Half - Blood Prince's identity from a different perspective, leading to unexpected revelations about the wizarding world's past.
Another plot twist might be that the relationship between Hermione and someone unexpected, like a Slytherin student, changes drastically. In the fanfic, they could start off as enemies but then find out they have a common goal related to the secrets of the Half - Blood Prince. This could lead to an unlikely alliance and a whole new set of adventures for Hermione.
The Half - Blood Prince himself, though his identity might be more of a mystery or a key to be uncovered in the fanfiction. His influence through his notes and spells would be a major part of the story.
One popular 'Ron and Hermione Half - Blood Prince' fanfiction is 'The Unseen Bond'. It delves deep into their relationship during that time, exploring the unspoken feelings and the tension that was building between them in the events of 'Half - Blood Prince'.
The 'Half - Blood Prince' is Severus Snape. He was a half - blood wizard, son of a Muggle father and a witch mother. His old potions book that Harry uses is filled with his own spells and notes, which is how Harry discovers his identity as the 'Half - Blood Prince' later in the story.
One interesting plotline could be Hermione struggling to control her new vampire instincts while still trying to be the top student at Hogwarts. For example, she might have a hard time resisting the urge to drink blood during her classes or exams, adding a whole new layer of difficulty to her academic life.
One plot idea could be exploring their relationship in more depth during the events of Half - Blood Prince. Maybe Ron starts to notice little things about Hermione that he hadn't before, like how she always has the right answer in class. Another could be a story where they have to work together on a secret mission related to the Half - Blood Prince's potions book. They might argue at first but then realize how much they rely on each other.
Well, in some fanfictions, the half - blood auror could be involved in uncovering a long - forgotten plot within the Ministry of Magic. This plot might be related to the dark arts and how some powerful wizards in the Ministry are secretly using it for their own gain. Also, their training as an auror could be detailed, showing the challenges they face in a world full of dark magic and danger.