Olivia Pullman is August's protective sister. Almost all of her life has revolved around around August. Starting High School is an oportunity for her to start off new without being "The Girl With The Deformed Brother". I think that Via is nice because she is patient with August.
Daisy was bought by August's dad from a homeless man. Daisy is the family's dog, who they love. August especially loves her because she does not judge him for looking different than most people. I think Daisy is a very helpful dog because she is a comfort to August.
Jack Will was one of Augusts first friends, he was one of the students asked to show August around the school a few weeks before it actually started. Even though he gets in a fight with August once, they make up and become good friends again. I think Jack Will is good because he usually stands up for August.