Adding a mystery element can make it more interesting. For example, there could be a hidden reason behind Harry's bullying that even he doesn't fully understand at first. Maybe it has something to do with a past event or a family secret.
Introducing other characters who are affected by the bullying situation can add depth. For instance, their friends could be torn between taking sides or trying to reconcile them. This would create more drama and complexity in the plot.
One popular 'harry bullies louis fanfic' might be 'The Bully's Redemption'. In this fic, Harry starts off bullying Louis but then gradually realizes his mistake and tries to make amends. It often shows a complex character development for both of them.
Add unexpected twists. For example, the Pokemon that gets brainwashed could turn out to have some hidden power that makes the brainwashing backfire on the gym leader. This would create a new dynamic and keep the readers on their toes.
One way is to focus on the character's journey of overcoming suicidal thoughts. Show how he gets support from friends and finds reasons to live.
Incorporate time - travel elements. With his immortality, Naruto could be sent back in time to change certain events in the Naruto universe. This would open up a whole new world of possibilities, like preventing some of the major tragedies that occurred in the original story or changing the fates of certain characters.
Involve other characters in unique ways. Maybe Aladdin could be a rival for Jasmine's affections in a different way than in the original story. Or have the Genie meddle in Jafar and Jasmine's relationship, perhaps trying to nudge Jafar towards the good side for Jasmine's sake. These character interactions can create more complex storylines.
One way to make it more interesting is through the use of different settings. Instead of just the usual Hogwarts setting, take the characters on an adventure outside, like to a magical forest or an ancient wizarding ruin. Daphne's possessiveness could play out differently in these new and dangerous environments. For example, she might be more overprotective because of the unknown threats, or her possessiveness could lead to her making a mistake that endangers them both. This would add excitement and novelty to the fanfiction.
To make a Harry Potter fanfic seem more realistic, start with the setting. Describe Hogwarts in more detail, like the creaky stairs, the smell of the different classrooms (the earthy smell of the greenhouses, the musty smell of the library), and the sounds of the castle at night. Also, focus on the characters' emotions. Don't just have them be happy or sad in a general way. For example, if a character fails a test, show their specific disappointment, like how they might avoid their friends for a while out of embarrassment.
Add some unexpected twists. For instance, just when the rescuers think they've found Carol, it turns out to be a decoy. This will keep the readers on their toes.
Add unexpected twists. For example, the girl could turn out to have some hidden power that she reveals while being protected, which then helps the guy in turn. This flips the dynamic a bit.
To make it more interesting, you could introduce a new and mysterious character that Percy meets while alone. This character could have a hidden agenda or a special connection to Percy's past.