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Behind the scenes
Real-world individuals with the given name Louisa include:
- Louisa Bettine, portrayed a student in Harry Potter and the Deathly Hallows: Part 1
- Louisa Warren, played a Hufflepuff seventh year in the film adaptations of Harry Potter and the Deathly Hallows
- Louisa Worley, portrayed a Hufflepuff student in the film adaptation of Harry Potter and the Philosopher's Stone