Lasli is a character from The Legend of Zelda: Breath of the Wild. She is a Sheikah who is the granddaughter Nanna. She works as a greeter during the day at the Enchanted clothing shop of Kakariko Village in the West Necluda region. Despite being a young woman, her grandmother insists she stay indoors at night due to the threat posed by monsters and Yiga Clan. Additionally, the Sheikah women and children had apparently been asked to stay indoors at night due to the danger, while the old men and guards stay out to train and keep watch over the village.
In Kakariko Village's Journal of Various Worries, she goes by the alias Struggling Shop Girl and in her entry she writes how her job at Enchanted has helped her numb the pain of not being able to hunt for fireflies at night as she had been asked not to walk around at night as it's dangerous, but that the only thing that makes her feel better is walking among the fireflies and doesn't know if she can cope without fireflies.
After completing "Find the Fairy Fountain" and "Flown the Coop", Link can visit Lasli's in her house at night. She requests that Link bring her 5 Sunset Fireflies. After obtaining five of them, Link must return to Lasli's house and release the five fireflies inside her house and she will reward him with a Purple Rupee.