Obviously, Harry and Hermione are the main characters. Harry is the one who undergoes the transformation into Hermione. Ron is also often involved as he is their close friend and his relationship with both Harry and Hermione is an important aspect. Dumbledore might also make an appearance as he is always aware of what's going on in Hogwarts and could play a role in either helping Harry deal with the transformation or in uncovering the cause of it.
Harry and Hermione are the key characters in this type of fanfiction. But other characters like Ginny Weasley can also play a role. Ginny might interact with 'Hermione' (Harry) and notice some differences in her behavior. Draco Malfoy could also be in the story. His usual taunts towards Hermione could take on a new meaning when it's Harry in her form, leading to some interesting confrontations or even unexpected alliances.
The main characters are, without a doubt, Harry and Hermione. Since it's about Harry turning into Hermione, their characters are central. Neville could also be involved. He might be one of the first to notice something strange about 'Hermione' (who is actually Harry). And of course, Professor McGonagall could be part of the story. As a strict but fair teacher, she could either suspect something is amiss or be a source of guidance for Harry in his new form.
Obviously, Harry Potter himself is the central character as it's about him in diapers. Dumbledore often features as he plays a crucial role in Harry's life. Hagrid might also be there as he has a special connection with Harry. And of course, the Dursleys could be part of the story, perhaps in their begrudging care of baby Harry.
Other important characters that frequently show up in Harry Potter funeral fanfiction are the members of the Order of the Phoenix. Since they were a group dedicated to fighting against Voldemort, when one of their members passes away, they would all come together. Sirius Black, if he hadn't died in the original story, could be at funerals of his friends or family. Also, Neville Longbottom, who grew into a strong and important character, would be present to honor those who have fallen in the battle for the wizarding world.
Obviously, Harry Potter himself is often a central figure. His friends like Ron Weasley and Hermione Granger also play important roles as they are part of his extended family - like group. Ginny Weasley, as Harry's wife in the original series, is also a key character. Then there are the older generation characters such as Molly and Arthur Weasley who bring their wisdom and family values to the alliance.
Obviously, Tonks is the central character. Her husband, Lupin, is also a very important figure. Harry Potter and his friends might also be involved in some way. For example, they could offer support or protection to Tonks during her pregnancy. Hermione, with her vast knowledge of magic, might be helping Tonks with any magical complications related to the pregnancy.
Dumbledore can also be a significant character. He might be the one who decides Harry's punishment or he could be the one to offer some wisdom to Harry during his time of being grounded. And of course, the teachers like Snape or McGonagall could be involved as they are often the ones who enforce the rules and punishments at Hogwarts.
The Weasley twins, Fred and George, are often the main instigators. They have a reputation for their mischievous pranks in the original series, so it's natural that they would be at the forefront of pranking Umbridge in fanfiction. Their creativity and disregard for authority make them perfect for coming up with elaborate and hilarious pranks against her.
The Weasley twins, Fred and George, are often the main instigators of pranks in Hogwarts fanfiction. They have a natural knack for mischief and are always coming up with new and creative ways to cause chaos in the school. Their products from Weasleys' Wizard Wheezes also play a big role in the pranks they pull.
Obviously, Harry Potter is one of the main characters. He often takes center stage in these fanfictions when it comes to the animal - related plots. Hermione Granger is also commonly involved as she is known for her knowledge of magic and animals in the original series. Ron Weasley usually tags along as well. Sometimes, characters like Hagrid, who has a great love for magical animals, also play important roles. These characters interact with the animals in different ways, whether it's to protect them, study them, or go on adventures with them.
In Harry Potter's prank fanfiction, the main characters involved are typically the mischievous ones. The Weasley twins are at the forefront. Their inventive minds and love for chaos make them perfect for prank - filled stories. Harry can also be involved as he has his own streak of daring. Then there are the other Gryffindors who might join in on the fun. Even some of the Slytherins could be part of the prank - related plots, either as rivals setting up counter - pranks or as unexpected allies in a particularly wild prank. Luna Lovegood might also make an appearance, adding her unique and dreamy touch to the pranks.
Often, it could be the young children of the main characters from the original Harry Potter series. For example, Harry and Ginny's child might be the focus. The parents themselves, like Harry and Ginny, would also be important characters as they guide their child through the potty - training process.