The Promise of Nariko

Nariko's mother told her that her name meant 'gentle child' meaning she would always be the one young at heart, caring for those in need.
That was her promise.

At twelve, her mother declared the promise was alive, for the greater good of the world. Nariko was forever trapped on the day before her thirteenth birthday, caring for the sick, giving to the poor, without a home of her own, in the unforgiving streets of London.
However, after twenty years in this cycle, Nariko is desperate to break her promise and live a normal life. The spirits told her that she would die, only when her job was done. Said she would live for thousands of years, but never reach her thirteenth birthday.
But Nariko isn't one to take no for an answer.