Gas-O is a playable character from Bust A Groove. Gas-O first became interested in becoming a scientist when he was eight. At 15, he has accomplished several outstanding tasks, including consulting for NASA, logging time on a particle accelerator, and studies the gaseous elements in his laboratory. He enjoys tinkering with dangerous chemicals in his free time. Gas-O appears in Bust A Groove 2, but is unplayable. Instead, he is mentioned in Bi-O's epilogue as his son. After Bi-O attempts to unmask Gas-O, he poured the latest poison gas on BI-O. In addition, Gas-O chopped off his head with an axe. As a result, Gas-O is serving time in a juvenile reformatory. Of course, he cannot participate in the dance battles.