The Weasley twins are the most common, no doubt. Their mischievous nature makes them the stars of many prankster fanfics. Neville Longbottom can also be a character in these fanfics. Sometimes he is the target of pranks, but in some fanfics he might surprise everyone by joining in on the prank - making fun. And Peeves, the poltergeist, is often involved as he loves causing chaos and can be a great addition to the prankster crew or the cause of some problems for the pranksters.
The Weasley twins, Fred and George, are very common. They are the original pranksters in the Harry Potter series, so it's natural for them to be central in many fanfics. Harry Potter himself also often appears in these fanfics, either as a victim or sometimes as an accomplice to the pranks. And of course, Ron Weasley, being their friend, is also frequently included.
Definitely Fred and George Weasley. They are iconic for their pranks in the original books, so in fanfics they are often the main characters or at least the inspiration for new pranksters. Then there's Lee Jordan, who was their friend and often helped with their radio show and probably some pranks too. Hermione Granger can also be a common character, usually as the one trying to stop the pranks or getting caught up in them in an unexpected way.
One popular Harry Potter prankster fanfic is 'The Prankster's Apprentice'. It focuses on a new student at Hogwarts who becomes the protege of the Weasley twins in their prank - making adventures. Another is 'Pranks and Potions' which combines the chaos of pranks with the study of potions in an interesting way. And 'The Secret Prankster Society' where a group of students form a secret club dedicated to pulling the best pranks in the school.
Definitely Loki from the Marvel universe. If he were to crossover into the Harry Potter world, his shape - shifting abilities and mischievous nature would make him the ultimate prankster. He could transform into Professors and lead students astray, or make the Quidditch balls act in the most unexpected ways during a match.
Well, I think Orion is a really cool shapeshifter character in some fanfics. He can shapeshift into a powerful dragon, which is just amazing. He uses this form to protect Hogwarts from various threats. There's also a character named Nova. She's a shapeshifter who has the ability to blend into her surroundings by taking on the appearance of the environment. It's a very unique power that she uses in really clever ways. And let's not forget about Thalia, who can shapeshift into different mythical creatures and often uses her powers to help her friends in their adventures.
Kakashi can be a common character too. He might be the one who has to deal with Naruto's pranks and the chaos they cause in the village. Sometimes he might play along or use it as a teaching moment for Naruto. Also, the other members of Naruto's team, like Yamato, could be involved, either being pranked or helping Naruto plan his pranks.
Luna Lovegood often becomes an extremely interesting character in these fanfics. Her unique view of the magical world can lead to some really cool midnight escapades. For instance, she might lead Harry on a midnight search for a rare star - related magical object that is only visible at midnight.
Harry Potter himself is often a central and very popular character. He's usually the one on the journey to become a master enchanter. Hermione Granger is also popular as she often aids Harry with her extensive knowledge. And sometimes, Severus Snape can be a key character, perhaps as a mentor or an obstacle in Harry's path to enchanter mastery.
Obviously, Harry Potter himself is very common. He's the central character in the original series, so fanfiction often continues his story or reimagines it. Hermione Granger is also a frequent character. Her intelligence and strong - willed nature make her a great focus for many different storylines. Draco Malfoy is another popular one. Writers like to explore his character further, perhaps showing a more complex side to him than in the original books.
Voldemort is quite common. Since he's the main villain in the original series, fanfic writers often use him to create darker storylines. Bellatrix Lestrange is also popular. Her insane and violent nature gives a lot of room for dark interpretations.
Harry Potter himself is very common. After all, he's the main character in the original series and is likely to be at the center of any apocalyptic events in the fanfiction. Hermione Granger is also frequently seen as she's smart and resourceful, which are great traits in an apocalypse. Ron Weasley is another one, as he's Harry's loyal friend and has his own set of skills.
The new generation of students at Hogwarts are very common in these fanfictions. Characters like Teddy Lupin, who has his own unique backstory being the son of Remus Lupin and Nymphadora Tonks. Also, the Weasley - Potter clan members are frequently seen. And in some fanfictions, there are original characters created by the authors, who interact with the well - known Harry Potter characters and add new dynamics to the story.