Louisa Clark is a fictional character from the novel "Me Before You," written by Jojo Moyes. She is portrayed as a quirky and cheerful young woman who takes a job as a caregiver for a man named Will Traynor, who is paralyzed from the neck down. Louisa's journey explores themes of love, personal growth, and the impact of choices on life. Throughout the story, Louisa's character evolves as she navigates her relationship with Will and confronts her own aspirations. Her experiences challenge her to step outside her comfort zone and ultimately lead to profound changes in her outlook on life and happiness.