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His Grandfather.
Harry Potter, Hermione Granger, Ron Weasley, Professor Albus Dumbledore, Lord Voldemort, Draco Malfoy, Dolores Umbridge, Neville Longbottom, Bellatrix Lestrange, Lucius Malfoy, Cornelius Fudge and Sirius Black are some of the main characters in Harry Potter and the Order of Phoenix.
Harry Potter, Hermione Granger, Ron Weasly, Ginny Weasly, Luna Lovegood, Sirius Black, Neville longbottom
Dobby the house-elf told Harry about it .
Harry, Hermione, Ron, Neville, Luna, and Ginny went to the Department of mysteries. Later members of the Order of the Phoenix came like Lupin, Tonks, and Moody.
Neville Longbottom is on the suspension Bridge.
By asking him to.
Just like Neville and Luna: nobody killed them, so they survived.
His Grandfather.
Harry Potter, Hermione Granger, Ron Weasley, Professor Albus Dumbledore, Lord Voldemort, Draco Malfoy, Dolores Umbridge, Neville Longbottom, Bellatrix Lestrange, Lucius Malfoy, Cornelius Fudge and Sirius Black are some of the main characters in Harry Potter and the Order of Phoenix.
Harry Potter, Hermione Granger, Ron Weasly, Ginny Weasly, Luna Lovegood, Sirius Black, Neville longbottom
Dobby the house-elf told Harry about it .
Harry, Hermione, Ron, Neville, Luna, and Ginny went to the Department of mysteries. Later members of the Order of the Phoenix came like Lupin, Tonks, and Moody.
Harry Potter, sirius Black, Ron Weasly, Hermoine Granger, Neville Longbottom, Umbridge, Fred and george weasly, AND heaps more
help Neville burn all the plants
The movie differed from the book. In the movie it was Neville Longbottom that informed Harry of Gillyweed. In the book it was Dobby the house elf. I agree with the above, but thought I should point out that Dobby is replaced by Neville a lot in the films. In Order of the Phoenix the book, it's Dobby who informs Harry about the Room of Requirement, but in the film, it was, yep, you guessed it, Neville!
If you are talking about the six of them they are called Ron Weasley, Hermione Granger, Neville Longbottom, Ginny Weasley, Luna Lovegood and of course Harry Potter himself!