How is Stop Thief characterized?

Misha is the narrator and main character of the book. He is a young boy who found himself growing up in the streets of Warsaw, surviving by stealing food. As he and everyone he knows believe, Misha's small size, stealth, and speed are what helped him survive throughout the novel. In the beginning, Misha thinks his name is Stopthief because when ever he steals, people shout "Stop! Thief!", but then he meets a boy called Uri who introduces him to a group of other boys like him and tells Misha his name and story.

Throughout the novel, Misha is lost in his identity; whenever someone tells him you are something, he quickly believes that he is that identity. Because of the people around him, Misha was a Gypsy, a Jew, a Milgrom family member, and finally was given the name Jack by a stranger. He agreed to all the identities. Misha was also very inexperienced in life and knew very little about everything; he just knew bread and how to survive. In the end of the story, Misha gets married to Vivian but she soon leaves him after she gets married. After many years, his daughter and granddaughter finally find him and take him to live with them.