The Underworld Army is a huge army from the underworld, consisting of a massive legion of demonic monsters born from the depths of the Underworld and an antagonistic faction in the Kid Icarus video game series. In the original game, it was led to believe that Medusa was the leader of the Underworld Army, However, in Uprising, it revealed that Hades is the true leader. They are the main antagonist group in the Kid Icarus Series and one of the main factions in Kid Icarus: Uprising.
The Underworld Army is composed of the most well known enemies in the Kid Icarus series, such as the Eggplant Wizard, Plutons, Komaytos, and other enemies in Kid Icarus and Of Myths and Monsters. It also has many commanders such as Twinbellows, Thanatos, and Hewdraw.
- Pandora/Amazon Pandora
- Dark Lord Gaol (redeemed)
- Great Reaper