Gerbo is a dimwitted and childlike spider who is best friends with Bugbo. He often has fairly creative ideas, but they're quickly shut down by Bugbo in favor of his own plans, which Gerbo goes along with anyway. He is shown to have a caring heart for others and doesn't like it when things are unfair, such as the Hollow Clown being put out of business after all circuses were banned. He generally seems to be quite slow talking in comparison to other characters, and hangs around Bugbo most often.