Marvin (Peter Merryman) is a dark green schoolboy who frequently has his property or person vandalized by Vendetta's fiends. It is a running gag for Marvin to declare his loss or damage as a simple possessive exclamation, such as "My banana!", "My clams!" or "My hair!"
Marvin is always having his possessions forcibly taken from him, either by Vendetta, her fiends, or one of his eight younger siblings. Marvin does not pay much attention in school and spends a great deal of time drawing fanciful pictures. Someday he wants to own his own skyscraper.