The text presents a character versus character conflict. This is because Sara (who is a character) has to suffer the consequences caused by the egoism of Miss Minchin (who is another character), who treats Sara in a very bad way because the girl has become poor.
The Little Princess tells the story of Sara Crewe, a wealthy girl who loses everything when she experiences a terrible tragedy. Obliged to work as a maid, to go cold and to hunger, she continues to preserve her nobility, and thus maintains her pride and her generosity.
No that's not quite correct Grammar. It should be more along the lines of "He is very serious like that every time he's listening to music on YouTube. He is a certified music lover at a young age."