Zhu Qianyin

Of unknown origin, Zhu Qianyin has lived in the Ma family since childhood and is Ma Xiaodong's childhood friend. She is timid, shy, and not good at expressing herself. Despite being responsible for all household chores since she became self-reliant, her clumsy nature often leads to mistakes and punishment from Ma Qingchen. With a low status in the family, she lacks the qualifications to attend school and has the last turn for meals, and she is Ma Qingchen's punching bag when he's in a bad mood.

[From Steam]