Who is this little girl?

" That's enough, if brother Ning gets badly wounded then we won't be able to get more porridge, wife!" Shi Xi was scared but he could no longer stay silent when he saw that his wife was beating Ning Yu like he was a sack of potatoes, he was afraid that Ning Yu will be beaten to death, and he knew that his brother was too stubborn and even if he was beaten to death, he would not let out a word of pain which was why he decided to put a stop to this brutality. 

He also knew that his wife would not listen to him if he was to tell her to stop for the sake of not killing Ning Yu which was why he used the fact that he wanted her to stop for the sake of the extra food they were getting because of Ning Yu, because he knew that in the eyes of his wife, compared to the meal she got every day they were worthless.