Lilo Pelekai (literally, "lost" in Hawaiian) is the title character of the franchise. She is a young Hawaiian girl who lives on the island of Kauaʻi with her older sister Nani and her extended family of alien visitors marooned on Earth.

Lilo is a young girl with long, straight black hair and brown eyes. She is most often seen wearing a muʻumuʻu and sandals but also wears other warm-weather clothing as well as traditional hula costumes. In "Lilo & Stitch 2: Stitch Has a Glitch", her reflection in a mirror is compared to a picture of her young mother, suggesting that they look similar. In the episode "Skip" where an experiment (Experiment 089) is used to skip time for ten years and then another ten years, it is mentioned that older Lilo looks a lot like her sister Nani.

Her spirited and highly eccentric personality, especially in light of her parents' death, has alienated her from her fellow children, yet Lilo makes the perfect best friend for Stitch, an alien experiment whom she adopts as her dog. Lilo attends hula school and her hobbies include the photography of obese people, talking about creatures from horror/sci-fi movies, and capturing and rehabilitating Jumba's evil genetic experiments.

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