[1] Stein was born in China with sacral agenesis and spina bifida, for which she underwent surgery at a young age.

After spending seven years in foster care, she was adopted by American parents at age 10.

Following her adoption, she lived in Spring, Texas, and attended Roth Elementary, Strack Intermediate, and Klein Collins High School.

[2][3] As of 2024, she attends the University of Arizona, where she is studying nursing and competes on the school's track and road racing team.

[2] As a high schooler, Stein competed twice at the UIL Track and Field State Meet in the 100m and 400m wheelchair races, and in seated shot put.