A snake-like animal, MEDUSA is a computer program built for Ishida Finance and is used to find debts around the world in countries whose CO2 Emissions and Carbon Credits are not equal. Using these "debts," MEDUSA generates vast amounts of money for Ishida Finance through various manipulations of the Carbon Market (similar to the Stock Market). MEDUSA is originally believed to be the only program in the world that can perform these manipulations of Carbon Credits but it seems that there are other programs similar to it operating across the globe. MEDUSA is hidden in the Marshall Island and is protected by a typhoon created by a weather satellite.
|Character Navigation Bar|
|Hōjō Kuniko | Hōjō Nagiko | Takehiko | Momoko | Miiko|
|Naruse Ryōko | Z4 | Kusanagi Kunihito | Hōjō Nagiko | Sergei Talsian|
|Ishida Karin | MEDUSA | Zhang | Klaris Lutz | Sergei Talsian|
|Mikuni | Sayoko | Miiko|
|Broker Trio | Hiruko | Canary|