Zack is quiet and shy. He was reluctant to be part of the band at first, mostly due to having a very strict father, who forbade Zack from playing with electric guitar and rock music. But as Dewey's charismatic rock lessons continue to draw Zack into rock music, he becomes much more talented as an electric guitarist, and much more interested in rock music. Dewey discovers that Zack wrote his own rock song, which he was praticing during class, and Dewey is so impressed that he immediately decided to have the band learn Zack's song.