Po and Sin-Ga's mother had a one night stand in China during one of her trips around the world due to a drunken stupor. Sin-Ga's father had always wanted a child and their mother was already busy caring for Po at the time of Sin-Ga's birth so they decided to send her to China to live with her father. Many years passed on before Po came to get Sin-Ga from her home country thanks to her father's death. She now lives in America with Trei and her brother.