The phrase "poor girl" is a common expression used to describe someone who comes from a disadvantaged background or financial situation. Full definition
To me, it was a reverse fairy - tale not a story about a deserving poor girl who became a princess but one about a princess who lost her position and power. (bookbrowse.com)
In fact, UNESCO estimates that poor girls in sub-Saharan Africa will not be enrolled in school before 2086 — 70 years from now. (gse.harvard.edu)
Balochistan Province of Pakistan initiated two pilot programs attempting to induce the creation of private schools for poor girls. (semanticscholar.org)