Hacky performs as a member of the Shabondama Girls, a troupe specializing in elaborate bubble displays created through flute playing. Alongside Shabondama-hime (Princess Bubbles) and Purun, she crafts intricate, exquisite bubbles during their shows. During the film's events, Hacky participates in a performance disrupted by Baikinman, who takes over Shabondama-hime’s castle and steals the magical flutes. Her role centers exclusively on contributing to the bubble performances, serving a supporting function within the bubble flute show narrative.