Gusto is an artistic, individualist Gummi who was stranded on a deserted island a dozen years ago and rescued by Gruffi and Tummi. Later he doesn't live in Gummi Glen, but in an atelier cave hidden behind a waterfall. He is a creative artist of considerable talent, but has mercurial moods depending on how well his work is going or being appreciated. His flighty and outgoing personality makes him the polar opposite of Gruffi, whom he constantly tries to loosen up.

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