In the beginning of the book, Melba signed up for being one of the students to be at school. She was wondering if she's going to get accepted into Central.
Grandma India never changed throughout the book. Grandma was very religious and very close to God. She was by Melba's side when she needs it and gave her advice so it will help Melba with the school year. .
"The hulking soldiers continued to observe her peril like spectators enjoying a sport."
Link is a background character and plays a small role in the book. He helps Melba by giving her information about what's going to happen next.