Goo is a fictional character from the Gumby franchise and the secondary tritagonist of the series. She is a blue-colored mermaid-like humanoid with blonde hair while wearing a white hairbow who possesses the power to fly and spit balls of blue goo. She is a friend of Gumby who knows how to help other people. Goo has a sweet and kind nature, though she also has the tendency to be tricky and clever, especially where the Blockheads are concerned.