Dave plays the accordion, and is rather talented at playing it. He speaks with a Hispanic accent.
Personality-wise, he doesn't seem as over-dramatic as his fellow classmates and seems to handle things fairly well, but gets stanked anyways (most likely due to internal panicking that he doesn't show too much on the outside) where he gains the appearance of a thin blue monster with accordion-like arms.
He was once played like an accordion by Bash because he resents Dave's skills. While quieter and less expressive, that doesn't mean he doesn't get along well with others, and he actually has a good amount of friends, including his Klub pals and Howard.