To combat the rising plague of cockroaches and other household pests, the tiny, doll-like extermination gynoids known as "Hoihoi-san" were created.

It started out as a manga title serialized in Japanese language monthly magazine Dengeki Daioh published by MediaWorks, and later branched out to PlayStation 2 as a game and then further into numerous other media channels.

With this character a new level has been attained in the girls-with-guns genre: capable of an impressive rate of fire, handles a sword equally well, is dressed up very cutely, complete with bow ties and booties and an expressionless face.

In the game the muzzle blast is about the size of the robot, which combined with an impressive rate of fire makes for a definite statement in the girls-with-guns genre.

A modicum of style, finesse and Japanese tradition is retained by featuring[permanent dead link‍] a katana in the weapons selection.

HoiHoi-san Legacy by Kunihiko Tanaka started serialization in the seinen manga magazine Dengeki Black Maoh on 19 September 2007.

Due to laws in Japan the doll does not fire live ammunition, neither from the machine gun, nor from the missile launcher, so the company regretted lack of insecticidal effect.