This sister and brother are Ruella Joy and Mark. On days when lunch is served they choose not to finish all the food they receive so that they can take some home for their siblings. When they were asked about who would eat the food they were saving, Mark said that his younger siblings will be the one who will eat it, because they have no rice to cook at home.
This was a decision Mark and Ruella Joy made together. No one had to tell them to do this.
