Ginny Weasley, who appears far less feisty in the movies than she does in the books. It's unfortunate since along the course of the books, Ginny develops into a strong, self-reliant member of Harry's friend group.
The Harry Potter books and movies, however they don't feature as much James Potter as the original works, heavily influence Harry's journey through the lives and deaths of his parents.
Though the Harry Potter films don't focus on Percy's growing, the novels' Percy makes him a far greater character.
Throughout the seven Harry Potter books, he makes multiple appearances and plays a significant role in the nightlife of Hogwarts. During numerous late-night adventures in the castle, Harry and his companions encounter Peeves, who occasionally helps Harry out of a difficult situation.
While Charlie Weasley isn't as cut from the Harry Potter films as Peeves is, he almost certainly is. Charlie appears in the movies just once, in the scene while the Weasley family is on vacation in Egypt.
Important plot points that show how Dobby's personality grows over the series are omitted from the films. The majority of the House Elf scenes from the books are left out of the movies, along with Barty Crouch's Winky and the Elves doing labor in the Hogwarts kitchen.
Given how crucial a role it plays in the conclusion of the book, the TV adaptation ought to try to depict Dudley's development.
Many of his greatest moments from the books were omitted from the Harry Potter films. Time restrictions probably had some part in this, but it lessens Sirius's sense of wholeness and lessens the tragedy of his passing.
In the Harry Potter films, Ralph Fiennes played the legendary character Voldemort. However, because of his extravagant portrayal, it can be challenging to take the evil seriously.
Rupert Grint is an excellent option for the role of Ron, but even so, the actor is unable to get past the writing choices that reduce Ron to the status of a passive-aggressive sidekick. Ron is a beloved character by fans because of his comedy and fierce loyalty, neither of which are adequately portrayed in the films.