Who's that?

One day, Mackenzie switched schools. At her previous schools, She was bullied a lot, She was scared to go to school, But also excited cause she had an old friend at this school. She had made many friends in all her classes. 5th period rolls around... She had made a friend named Jarred, hes in most of her classes, She sees him sitting next to a kid who keeps starring at you.... Who's that..?