The Darker and Edgier Edens Zero, in contrast with the predecessors Rave Master and Fairy Tail, has made way more of the villains as despicable as possible and some of them take it even further.
Recurring villains[]
- Dr. Müller was initially presented as a kind scientist from Planet Newton who aids an android named Hermit to complete a contraption known as the "Accelerator" under the pretense on saving Hook, a neighboring planet filled with androids. In truth, Müller manipulated Hermit to build a superweapon to obliterate Planet Hook, and after said planet is obliterated, Müller reveals his true colors by saying that humans are superior to machines, before beginning to torture and dismantle Hermit for research and for his own amusement. As if that wasn't bad enough by itself, we also later learn he's also responsible for ruining Jinn and Sylph's lives as well. How did he do this? By forcing Sylph to watch as he slowly sawed Jinn's limbs off with a chainsaw. They were both young children at the time, too. It's not an exaggeration to say this is one of the most vile, despicable characters that Hiro Mashima has ever written.
- Cure is a member of the Oración Seis Interstellar who is secretly responsible for three of the Oracion Seis Galactica's rise to power. Cure is also the one behind most conflicts of the Sakura Cosmos and Aoi Cosmos arcs, as he gave Drakken and Nero their powers, thus being behind 200 years of a planet's population being drained, the lives lost during the Aoi war, and the creation of Deadend Crow, an enormous Titan Android who has killed millions of people. When confronted by his ally Holy, a survivor of "Bloody Atmos Day Incident" by the hands of Crow, he blasts her in the stomach and admits he gave Drakken, Nero, and Crow their power so he could create villains in order to justify the existence of the Oración Seis Interstellar. Cure is willing to sacrifice anyone so he can maintain a disturbed balance of good and evil. uncaring for all the lives taken in the process.
Arc-specific villains[]
- Illega arc: Illega is a bloated frog alien who pays criminals to kidnap and bring him women, who he turns into stone statues to be used as furniture. Once Rebecca uncovers his room containing hundreds of stone women, Illega arrives holding Copa at gunpoint, promising to release her should Rebecca kneel before him and become his toy forever. When news of the planet destroying Chronophage arrives, Illega plans to start his collection again on another planet.
- Digitalis arc: Spider goes by the name Jamilov in the digitized world of Digitalis. Cheating to give himself an advantage, Jamilov wanders through the fantasy computer world, slaughtering the living NPCs for fun, while taking a special joy in murdering player characters so he can also kill them in the real world, exterminating entire towns. When he arrives at the town Shiki and Rebecca are at, Jamilov tortures and impales several PCs upon a spike to let them die slow and gleefully brings an army to massacre every living thing there, even trying to murder a child for an advantage. When thwarted, he tries to erase the Eden's Zero and kill everyone aboard the ship for sheer spite.
- Sun Jewel arc: Kurenai Kogetsu, aka Madame Kurenai, was a slave freed by the heroine Valkyrie. Rather than return to her lost daughter Homura, Kurenai married the slaver Baron Mordo and murdered him to take over the planet Sun Jewel. Running the world as a horrific tyrant, Kurenai uses an orbital cannon to vaporize anyone who defies her and amuses herself via sadistic games such as burning a model's face off and using him as a broken pet. Upon the rebellion of the mining districts, Kurenai decides to exterminate them all, including her own daughter, simply to show she is not to be defied and to punish them for honoring Valkyrie's memory.