A common plot device could be the reunion plot. Harry Potter has been away for some reason (maybe trapped in another dimension) and he finally returns to be a part of Midoriya's life. There's also the conflict plot where the knowledge of Harry Potter being Midoriya's father causes problems. For instance, some people in the My Hero Academia world might be suspicious of Midoriya because of his connection to a wizard from another world, leading to discrimination or challenges that Midoriya has to overcome.
The fish - out - of - water plot is often used. Harry Potter, being from a different universe, has to adapt to the world of My Hero Academia. This can create humorous and interesting situations. Also, the power - transfer plot. Maybe Harry Potter transfers some of his magic to Midoriya, which gives Midoriya a new power or enhances his existing quirk. This can lead to all sorts of new storylines about Midoriya learning to control this new power.
One common plot device is the discovery plot. Midoriya might find out in a very dramatic way that Harry Potter is his father. For example, he could find a hidden letter or a magical object that reveals the truth. Another device is the mentor - like role of Harry Potter. Since he's so experienced in magic, he could teach Midoriya some special skills related to his quirk that has a magical origin.
One common plot device is the revelation of a long - hidden secret. Maybe a magical object reveals the truth. Another is the idea of a love triangle that was more complex than originally thought. Snape's love for Lily could be re - imagined as leading to Harry's conception. And sometimes, there are plot devices around magical interference during Lily's pregnancy that made everyone think James was the father when in fact it was Snape.
A common plot device is the misinformation or false memories within the story. For instance, Sakura might have been raised believing one thing about her father, but then through a series of events in the fanfiction, she discovers that Madara is her real father. Another device could be the use of a special bloodline or power that only makes sense if Madara is her father. This power then becomes a central part of the plot as Sakura tries to master it and understand her true identity. Also, the idea of a fated encounter between Madara and Sakura's mother, which was kept secret for some reason, is often used to drive the story forward.
One common plot device is the revelation of a hidden past. For example, there could be a long - lost memory or a secret agreement that ties Kakashi to being Sakura's father. Another is the use of emotional turmoil. Sakura might find out about this relationship in a very dramatic way, like during a battle when she's at her lowest point and this revelation gives her new strength.
One common plot device is the introduction of new characters who initially misunderstand Harry, which makes him feel more alone. For example, a new student might come to Hogwarts and, because of rumors or Harry's fame, avoid him or be unkind, adding to his sense of isolation. Another device could be the separation from his friends. Maybe there's a magical accident that sends Harry to a different dimension or a locked part of the castle where he's completely alone and has to figure out how to get back while feeling lonely and scared.
A common plot device is the exploration of a hidden magical world related to Merlin. Harry, as the heir, is the key to unlocking this world. There might be new magical creatures, spells, and challenges there. He could also face opposition from those who fear his new power or those who want to use him for their own evil purposes. This creates conflict and tension in the story. Additionally, his connection to Merlin could lead to a rewriting of history or a new understanding of the origins of magic in the wizarding world.
A common plot device is misdirection. Harry might create a false lead or distraction that makes Snape focus on the wrong thing. For example, he could stage a minor 'accident' in the corridor that draws Snape's attention while he slips away to do something else he's not supposed to. Another device is using his friends' unique abilities. If Hermione has found a loophole in a rule, Harry can use that knowledge to outmaneuver Snape who is always strict about the rules.
A plot device could be Cedric getting involved in Harry's personal quests. For instance, if Harry is trying to figure out something about his parents, Cedric may insert himself into the situation, believing he can protect Harry better that way. He might also try to monopolize Harry's time for training or studying, which could lead to some tension between them as Harry might feel smothered.
A typical plot device could be the influence of an outside force. Say, a kind wizard or witch comes to the Dursleys and makes them understand the importance of Harry and his magic, and then they start to love him. Also, it could be that Harry himself shows extraordinary kindness towards the Dursleys in a difficult situation, which melts their cold hearts and changes their attitude towards him.
One common plot device is the 'what - if' scenario. For example, what if Hermione had been the one to save Harry from the Dementors instead of his father's Patronus? This can lead to a deeper emotional connection between them. Another is the 'arranged - relationship' plot, where they are forced to pretend to be in a relationship for some magical reason, but end up falling in love for real. Also, the 'jealousy' plot device, where they get jealous of each other's relationships with other characters and realize their true feelings.
One common plot device is time - travel. A character might go back in time and accidentally change something that makes Draco Harry's son. Another is a powerful magical curse or blessing that alters family relations. For example, a curse on the Malfoy family that can only be broken if Draco is 'adopted' into Harry's family in a magical sense.