Leanne (c. 1979-1980) was a witch who attended Hogwarts School of Witchcraft and Wizardry from 1991 onwards and was a friend of Katie Bell during her sixth year. She was sorted into Hufflepuff, with Pomona Sprout as her Head of House, and was in the same year as Harry Potter. 
Hogwarts years (1991-1998)
Leanne started her magical education at Hogwarts School of Witchcraft and Wizardry in 1991 and was Sorted into Hufflepuff House. Her Head of House was the Herbology Professor, Pomona Sprout, and she shared a dormitory in the Hufflepuff Basement with Hannah Abbott, Susan Bones and Megan Jones. Despite being in separate Houses and different ages, she became good friends with Gryffindor student Katie Bell. It is unknown if Leanne joined Dumbledore's Army in 1995, as Katie did, but she joined the group in late 1997, when Neville Longbottom assumed the group.
- "I tried to stop her, but she wouldn't listen!"
- —A distressed Leanne to Harry, Ron and Hermione.[src]
Leanne was very distraught when Katie was put under the curse, trying to pull her down from the sky in which she floated above from and was seen crying. Harry, Ron and Hermione got to the scene and, with the help of Rubeus Hagrid, they got back to Hogwarts with Katie. When they got back inside the castle, Leanne broke down crying when telling Professor McGonagall what happened and was sent to Madam Pomfrey for calming down. After Katie has been healed and returned to Hogwarts, Leanne was present with her when Katie told Harry she did not know who gave her the package.
- "Well, it’s not really like Hogwarts any more,"
- —Neville Longbottom speaking of the school under the reign of Snape[src]
In Leanne's seventh and final year at Hogwarts School of Witchcraft and Wizardry her education would take a turn for the worst. With the former headmaster Albus Dumbledore dead, Severus Snape took to the position of head and employed Death Eaters, Amycus Carrow and Alecto Carrow as new members of his staff. Any resistance against the war and defiance against their teaching methods had the student brutally punished, as demonstrated numerous times with pupil Neville Longbottom, the leader of the reformulate Dumbledore's Army, group that she eventually joined in that year.
Battle of Hogwarts
Late into the academic year the climax of the Second Wizarding War broke out and the Battle of Hogwarts took place. Leanne was present during this battle, and was seen fighting Dementors at one point. She survived the battle, and was later seen sitting with Katie Bell, Padma Patil and Cho Chang.
Behind the scenes
- Leanne is portrayed by Isabella Laughland in the film adaptation of Harry Potter and the Half-Blood Prince. Based on screenshots from the film, she is a Hufflepuff in Harry's year, although neither her house nor age is revealed in the book. She reprised her role in both parts of the film adaptation of Harry Potter and the Deathly Hallows.
- But in the book, it is possibly that she is a Gryffindor from Katie's year, as she was the one of Katie's friends in the Gryffindor Tower (as she just told her about the last Quidditch match against Hufflepuff). Also in some screenshots from Harry Potter and the Half-Blood Prince (film), she is shown to be a Gryffindor, but in Harry's year.
- In the video game adaptation of Harry Potter and the Half-Blood Prince, Leanne has blonde hair during play mode, but during a cut scene mode she has brown, like in the film.
- In Harry Potter and the Deathly Hallows: Part 1, Leanne can be briefly seen on the Hogwarts Express sitting next to Romilda Vane, Lavender Brown, and Cormac McLaggen.
- Leanne is shown to be a member of the Dumbledore's Army in late 1997.
- In LEGO Harry Potter: Years 5-7, Katie Bell's cursing is omitted and due to this, Leanne is absent from all the consoles versions of the game. However, Leanne is playable in the portable versions including the Nintendo DS and 3DS.
- Harry Potter and the Half-Blood Prince (First appearance)
- Harry Potter and the Half-Blood Prince (film)
- Harry Potter and the Half-Blood Prince (video game)
- Harry Potter and the Deathly Hallows: Part 1
- Harry Potter and the Deathly Hallows: Part 2
- LEGO Harry Potter: Years 5-7 (DS Version)
- Harry Potter and Me