luna lovegood

Luna Lovegood is a fictional character in the Harry Potter book series written by J. K. Rowling. The character is portrayed by Evanna Lynch in the film adaptation of Harry Potter and the Order of the Phoenix.

Character development
Rowling has often said that Luna is the "anti-Hermione", as Luna believes things on faith alone, while Hermione grounds her views on facts and logic.[5]Hermione sees Luna as gullible, whereas Luna views Hermione as narrow-minded. Although they have different views, Luna and Hermione eventually become friends.
Despite her quirkiness, Luna is often perceptive about human nature, and Harry notes her knack for blunt honesty. She also holds her friends in extremely high regard, as Harry notices (with affection) that she has painted portraits of her friends (Harry, Ron, Hermione, Ginny, and Neville) on the ceiling of her room, connected by chains made of the word "friends" repeated over and over. Both Luna's parents are magical. Luna appears to be an only child as no mention is made of siblings. Rowling has stated that Luna is her favorite "new" character in the series.
Appearances
Harry Potter and the Order of the Phoenix
Luna first appears in Harry Potter and the Order of the Phoenix when Harry, Ginny, and Neville join her in a compartment on the Hogwarts Express. Luna is in Ravenclaw. Luna is isolated at school, but she appears to care little for what others think. Harry, during this particularly turbulent year of his life, forms a strong friendship with Luna, who is the only person who can quell his anger and calm him down when many of his closer friends cannot, and she supports Harry many times during the series. She and her father, Xenophilius Lovegood, believe Harry and Albus Dumbledore when they claim that Lord Voldemort has returned; with Hermione, Luna persuades Rita Skeeter to interview Harry so that his views can be published in The Quibbler, the magazine to which Luna's father is the editor. Luna also becomes a member of the Dumbledore's Army, and later in the book joins Harry, Ron, Hermione, Ginny, and Neville in the conflict with Death Eaters at the Ministry of Magic Department of Mysteries and, when she is separated from Harry along with Ron and Ginny, appears to be the only one uninjured until hit by a stunning spell. Towards the end of Book 5, Luna consoles Harry by sharing her views on death after the loss of his godfather, Sirius Black.
Harry Potter and the Half-Blood Prince
In Harry Potter and the Half-Blood Prince, Luna is first seen on the Hogwarts Express. When some other female students invite Harry to join them in their compartment by saying that he does not have to sit with Luna and Neville, implying that they are undesirable companions, Harry witheringly states, "They're friends of mine." Luna observes in her bluntly honest way that people expect someone like Harry to have "cooler friends than us". At Christmas, Harry invites Luna on a platonic date to the party hosted by Horace Slughorn. The author noted in an interview that she "really enjoyed" writing Luna's commentary and considered it "blinding insight". Later, when Death Eaters attack Hogwarts, Luna, Ginny and Neville are the sole D.A. members who answer the call to protect the school. During Dumbledore's funeral, Harry feels a "great rush of affection" for both Luna and Neville as the former helps the latter into his seat.
Harry Potter and the Deathly Hallows
In Harry Potter and the Deathly Hallows, Luna and her father attend Bill and Fleur's wedding at the Burrow, during which she immediately recognises Harry, despite the fact that he is disguised with Polyjuice Potion, simply by the expression he has on his face. It is then revealed that while travelling home for Christmas on the Hogwarts Express that year, Luna was kidnapped in an effort to prevent her father from publishing information in support of Harry Potter in The Quibbler. When Harry, Ron, and Hermione are at the Lovegoods' home, Xenophilius, desperate to save his daughter and only child, betrays them to the Death Eaters in the hope that doing so will secure Luna's release. When Harry returns to Hogwarts in search of the Ravenclaw item that Voldemort had turned into a Horcrux, Luna helps him enter Ravenclaw's common room in order to view a replica of Rowena Ravenclaw's diadem. Later, she fights bravely in the Battle of Hogwarts and summons her Patronus charm to help fight off hundreds of oncoming Dementors about to attack Harry, Ron and Hermione. After Harry's supposed death, Luna ends up duelling Bellatrix Lestrange, along with Hermione and Ginny, until Molly Weasley takes over and defeats Bellatrix herself. Finally, Luna is among the first to congratulate Harry when Voldemort is defeated. In Rowling's first televised interview after the release of Harry Potter and the Deathly Hallows, she revealed a number of aspects of Luna's life after Hogwarts. It was also revealed that Harry and Ginny named their third child and only daughter Lily Luna after their "dear friend".