Abarenbou is a chaotic, water-like creature known for rowdy and unpredictable behavior. He typically appears mostly nude, with comedic focus on his buttocks through shaking or flatulence, though adaptations for younger audiences add clothing. His distinctive feature is his epic eyebrows. He explodes into scenes suddenly and illogically, creating disruption without clear motivation, serving as a comedic interloper. A possible relative named Bon exists who strongly resembles the character Piyoko, but Piyoko denies knowing Abarenbou, leaving any familial connection unconfirmed. In the Summer Special 2000, using the alias Paya-paya, he attempts to destroy the Gamers store and rebuild it, demonstrating a willingness to use perceived wealth for destructive ends. He also transforms into a giant broccoli monster during the Christmas Special and participates in a collaborative play in the Tsuyu Special. Despite his name meaning a man who goes on a rampage, he is never shown actively rampaging.