In The Absolutely True Diary of a Part-time Indian, who contributes to Arnold's maturation?
In The Absolutely True Diary of a Part-time Indian, Arnold is influenced by others around him and they all contribute in some way to his maturation. First, Arnold's grandmother is the most forgiving and understanding person whom Arnold knows and she encourages her grandson to always look for the good in things. Arnold's grandmother, however, is not naive and she understands the significant problems that exist on the reservation, but she recognizes the ills of the reservation as consequences of greater problems and tells Arnold that he must live a just life.
When Arnold goes to Reardon, he meets friends there who help him mature. Gordy is a bit of an outcast just like Arnold, so the friendship between the two comes easily. Through Gordy, Arnold begins to learn that it is fine to just be himself. And once Arnold makes friends with the more popular crowd like Roger and Penelope, he realizes that behind the mask, popular people have problems too. Thus Arnold matures as he learns the truths of the world.