How does Via's attitude towards her brother change throughout the story

Via, sometimes feels like the less important child in her family, since everyone often puts Auggie's needs first. She is starting at a brand new high school at the beginning of the novel, and faces struggles to fit in and be defined by an attribute other than having a deformed little brother." As the novel progresses, Via becomes his staunch defender, challenging people who even look at Auggie the wrong way, What the heck are you looking at?" I'd say to people—even grown-ups.