The main antagonist of the series and the evil emperor of the Shadow Realm. According to his subordinates, he was sealed at the beginning of the story by Euphoria. Whenever his minions collect negative energy from humans, Nogo becomes one step closer to reviving. Though revived, Nogo is defeated by the Glitter Force in their Princess forms with only a surviving fragment reforming into an egg. This egg soon hatches after being filled with more negative energy, leading Nogo to gain a new form that almost destroys the world until he is stopped once and for all by the Glitter Force.
In the past, Nogo invaded Jubiland with his minions, but Queen Euphoria used all her power to seal Nogo away, but he stole the source of her power, the Glitter Charms, and gave them to his minions, Ulric, Brute, Brooha, and Rascal.
Nogo's minions then went to Earth and sucked the hopes and dreams out of people, collecting their negative energy to turn the Wheel of Doom, so that Nogo becomes one step closer to reviving. Eventually Nogo is revived, but the Glitter Force almost immediately defeat him in Princess Mode. However, Nogo survives, as their attack is not strong enough to destroy him, and is sealed inside an egg, which is collected by Rascal.
Nogo's minions once again collect negative energy from humans to turn the Wheel of Doom and release Nogo, who comes to Earth in his egg, which has turned into a giant cocoon. Nogo reawakens after Rascal sacrifices himself to complete the revival, and summons an army of shadow monsters, who defeat the Glitter Force, before Nogo paints the Glitter Force book black, sending the Glitter Force into the Land of Despair, from which they are saved by Candy. Nogo attacks Candy, but the Glitter Force turn Royal Mode, destroy Nogo's army, and fight Nogo, quickly gaining the upper hand.
However, Nogo survives and transforms into a void of darkness. Nogo begins to consume the earth, and smashes the Glitter Force with his fist, breaking their transformations. The Glitter Force use the Miracle Jewel to transform one last time, and destroy Nogo once and for all.