HoiHoi-san is the titular character of the anime series "Ichigeki Sacchu!! HoiHoi-san." She is a miniature robot designed to exterminate pests and vermin that have become immune to traditional extermination methods. Despite her small size and cute, doll-like appearance, HoiHoi-san is incredibly efficient and capable in her role. The series humorously explores themes of technology and consumerism, with HoiHoi-san often finding herself in comedic situations. Her character highlights the unintended consequences of advanced technology and its place in everyday life.