One of my favorite backstories involved a teen living on her own in San Myshuno.
Bridget O'Rourke was the eldest daughter of Michael O'Rourke, one of the top crime bosses in Roaring Heights. She grew up dreaming of adventure, but when she became a teen, she learned that her father planned to marry her to the son of one of his rival mob bosses in a merger sort of deal. That didn't sit well with her so she confided in the family lawyer (who'd loved her as a daughter after losing his only daughter in a tragic houseboat fire in Isla Paradiso) and the lawyer was able to sneak §20K out of the family trust funds for her. She changed her name to "Cali West" and moved to San Myshuno, enrolling in the local high school and collecting items to sell for extra spending money (and completing her Curator aspiration).