Something to note about Lillian Dorea Potter: that hadn’t always been her name.
Otherwise, in which Haruno Sakura is reborn as the twin sister of Harry and Jem Potter, and is left to the less than tender mercies of the Dursleys alongside her beloved younger brother, only to be introduced to a whole new world upon her eleventh birthday by her supposedly dead parents. The Wizarding World is hardly at peace though, and turbulent tides are ahead - but Sakura is used to navigating war and death, and she'll do everything in her power to ensure both she and her beloved brother come out unharmed.
