Officially designated the Heave-Ho Sisters (どすこい姉妹, Dosukoi shimai) and colloquially known as the Sumo Twins, these twin siblings feature distinctive thick lips and pigtails. They abruptly materialize during episodes, rupturing scenes with their trademark cry "Heave-ho!" (どすこい！), which remains detached from core storylines. Their defining mission revolves around an endless search for the mythical "coal candy." Following their debut appearances, the twins resurfaced in supporting capacities within the animated series Mashin Hero Wataru and Chō Bakumatsu Shonen Seiki Takamaru.