They are from the unbeliever background. She and her sister (Pyih Pyih Phoe 4121) are twins and they lost their mom in 2017 with the disease of menstrual disorder. Their father alone could not take care of them and educate them as the country situation is unstable. Moreover, the father has to look after his old mother too. Therefore, the twins are sent to Calvary.  Pyih Pyih Oo likes to play hide and seek and would like to be a dancer.  Her favorite subject in school is mathematics.