Describe one of the main characters. Who are they and what are they like? Include a quote from this character.

Donald Zinkoff is the novel's protagonist. An energetic, kind-hearted, enthusiastic, and often clueless boy, Zinkoff finds himself ostracized in school because of his awkward personality. Zinkoff laughs at every humorous thought that comes to mind and vomits several times a week until he has surgery to fix the upside-down valve in his stomach. After failing horribly in a track-and-field race, he's branded "Loser" by other students, a nickname that sticks with him into middle school. Although Zinkoff is continually rejected by others, he never assumes malice or cruelty. At the end of the novel, Zinkoff enters a dream-like, near-hypothermic state when he spends seven hours looking for a little girl who gets lost in the snow. Although the novel does not make it explicit, Zinkoff's behavior and tendencies suggest he is neurodivergent.