Nothing But The Little Sister (Sheldon Cooper Fanfic)
Lillian Hofstadter has always felt invisible-overshadowed by her family, belittled for not living up to their expectations, and clinging to the only person who truly sees her: her older brother Leonard. Years of depression, anxiety, and self-harm have left her scarred and uncertain if she'll ever belong.
When Lillian moves in with Leonard in California, she meets his brilliant, eccentric colleague Sheldon Cooper. Suddenly, her quiet, ordinary world collides with someone who might understand her pain... but can she finally find herself, or will she remain nothing more than "the little sister"?