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I am the Emperor of Darkness, you people of light, shall vanish into eternal darkness.
~ Alien Empera in Ultra Galaxy Fight: The Absolute Conspiracy.

Alien Empera (エンペラ星人 in Japanese), also referred to as the Dark Emperor or The Emperor, is an immensely powerful alien despot empowered by dark energy and the main antagonist of Ultraman Mebius, as well as the overarching antagonist of the Ultraman Showa continuity as a whole. He is the archenemy of Ultraman Mebius.

He commands a massive army of monsters and aliens that conquer planets across the universe in pursuit of his ultimate goal, to rid the universe of light and eclipse it in darkness. 30,000 years ago, Empera and his army invaded and occupied the Land of Light, where Empera fought the Father of Ultra and an intense enmity developed between the two.

He was initially shown in a flashback in an episode of Ultraman Taro before making his full appearance in Ultraman Mebius.

He was voiced by the late Kenji Utsumi.



Alien Empera was among the residents of a planet that would later be called Dark Planet. When the sun on his planet went out, its inhabitants began dying. However, one single being managed to survive by embracing the darkness, becoming Alien Empera and developing a hatred of light.

Invasion the Land of Light

Alien Empera during the Ultimate Wars

Almost 30,000 years before any of Ultra Brothers went to Earth, Alien Empera sparked the Great Ultra War by leading an army of aliens and monsters to take over the Land of Light in Nebula M78, the home of the Ultras. While he succeeded in doing so, the Ultras fought back against his forces. The final battle of the war occurred when Alien Empera dueled the Father of Ultra. The battle ended in a tie, with both fighters received a matching scar on their hips that would reminded them both of the intense battle. The injuries Alien Empera sustained forced him to retreat.

Ultraman Taro

Alien Empera's conquest of the Land of Light is detailed in episode 25. Later in the show, two Alien Temperors arrive on Earth to hunt the Ultra Brothers. Though not directly stated, magazine publications reveal these two were agents sent by Empera.

Ultraman Mebius

Prior the events of the show, Alien Empera opened a Space-Time Wave to lure aliens to Earth. starting with a herd of Dinozaurs. The Emperor's return was heralded when the predator Bogar was lured to Earth and began reviving and summoning several monster to Earth, such as Sadola and Twin Tail.

Alien Empera then assembled a team of his top generals called the "Four Heavenly Kings". The quartet was comprised of Yapool, Grozam, Deathrem and Alien Mefilas. The four took turns trying to destroy Mebius. Yapool, Deathrem and Grozam were all defeated, while Mefilas realized he couldn't defeat Ultraman Mebius and Ultraman and retreated, only to be killed by Empera for his failure.

Upon his arrival, Alien Empera trapped the sun in a coat of darkness and sent his Inpelaizers to attack different regions of the Earth. However, Mebius destroyed the Inpelaizers with his Mebium Dynamite attack. The Emperor sent two more Inpelaizers down to Earth but they were destroyed by GUYS and Zamsher, who came back to Earth to settle his unfinished business with Mebius.

Empera during his showdown with Mebius.

Alien Empera then decided to take over Earth himself. Empera destroyed most of Tokyo and encased the Earth in darkness after declaring his vengeance against the Father of Ultra for their battle 30,000 years prior. Zamsher attempted to stop Empera, but the Lord of Darkness's strength proved to much for the space samurai. Hikari equipped the Aarb Gear and attempted to assist in defeating Alien Empera, but his attempt proved as successful as Zamsher's and he was blasted to ground next to him. The two resolved to work together to stop the Emperor, but even with their powers combined, they were unable to stop him. Empera then turned his attention to the GUYS base, and fired a Darkness Fear at it to destroy both it and Mebius. However, Zamsher took the hit instead, sacrificing himself to save GUYS.

Hikari attempted to stop the Emperor with Zamsher's Hoshikirimaru, but he soon succumbed to exhaustion and vanished. Believing Hikari and Serizawa to both be dead, Ryu angrily attempted a kamikaze attack against Alien Empera, but the Emperor destroyed the ship with a single shockwave. However, Hikari managed to save Ryu by taking him on as his new host. Hikari tried to attack the Emperor with his Hikari Blade, but the Emperor avoided his attacks and blasted him back. Unwilling to let his friend be killed, Mirai stopped recuparating and transformed into Mebius to fight Empera. Mebius and Hikari combined and fired their attacks at Alien Empera, who blocked them with his cloak. The Lord of Darkness the unleashed his signature attack, the Rezolium Ray, against Mebius, destroying the Ultra Warrior.

However, the eight Ultra Brothers continued their offensive to destroy the Emperor's darkness casing around the sun and telepathically told the GUYS members not to give up hope. Mirai was also revived by the Knight Brace in a spiritual form, allowing him to merge with GUYS and Ultraman Hikari. Together, they formed Mebius and granted him a new form, Phoenix Brave Mode. The Emperor tried to attack Mebius, but his attacks were deflected back at him. Mebius then fired a Mebium-Knight shot through the GUYS' final METEOR, the Specium Redoublizer, and at Alien Empera. Zoffy also arrived and joined in, firing his M87 beam through the amplifier to help Mebius.

However, Alien Empera still managed to stay standing. Mebius then launched a Mebium-Knight Dynamite at Empera, fatally wounding him. As he died, Empera realized that the bond between the humans and Ultras was what allowed them to defeat him and accepted his fate, dissipating into light.

Ultraman Mebius Gaiden: Ghost Reverse

After being revived, the Four Heavenly Kings attempted to revive Alien Empera by merging the Giga Battle Nizer with the Emperor's essence in Mechazam. This plan was thwarted when Mechazam allowed Mebius to kill him, wishing to die as himself rather than bring about the return of Empera.

Ultraman Ginga S Movie Showdown! the 10 Ultra Warriors!

An Eteldummy copy of Alien Empera was created by Etelgar. He fought Mebius and was destroyed by the Ultra's Burning Mebium Dynamite.


  • Unlike other monsters in the Ultra series, "Empera" is not the name of Alien Empera's species.
  • He bears a resemblance to Sauron from Lord of the Rings.
  • Alien Empera was designed by Yasuhi Torisawa to resemble a "Dark Ultraman".
    • His design was based of the appearance of Alien Empera in The Ultraman Manga where he appeared as a dark humanoid shadow.
  • The first part of the short clip of the duel between Ultra Father and the emperor was actually footage taken from a stage show, up until they both fell to their knees.
  • Despite being "new" to the Mebius series, Alien Empera had actually been mentioned before during the syndication of Ultraman Taro.
  • It has been stated that Ultra Father and Mother met only because she was the silver cross member that tended to his wound after his battle with Alien Empera, thus without the emperor's invasion, now known as the great Ultra War, Ultraman Taro would never have been born.
  • It is also said the exhibition of Alien Empera's power during the war caused Ultraman Belial's desire for greater power. Due to this he is partially responsible to Belial's fall.
  • The monsters in Alien Empera's depiction in Ultraman Taro episode 25 include the monsters GandarSartanBemstarElekingJamilaTerochilusSadolaSnowgonVarricaneDancan, Seagorath, Gomora, and Black King.
  • Even though he was an evil alien, it seemed he died in peace (because he finally understood the meaning of light) as his body disintegrated into particles of light.
  • He is of the top three most powerful known dark forces in the Showa Universe (With Ultraman Belial and Alien Rayblood).
  • Alien Empera is notable for having worked with several of the other major villains in the Ultra Series, especially in stageshows.
    • Yapool was one of his followers.
    • He was in a romantic relationship with Zogu in multiple stageshows.
    • He teamed together with Alien Baltan in at least one stageshow.
    • In another stageshow, he teamed up with fellow villains Ultraman Belial and Juda.
    • He goaded Dark Zagi and Evil Tiga to fight the Ultramen for his amusement in another stageshow.
  • Alien Empera was originally believed to have resurrected as the villain Dark Lugiel when Ultraman Ginga first aired. This has since been disproven.

External links


           Ultraman English.png Villains

Main Villains
Absolute Tartarus | Alien Benzen | Alien Empera | Alien Garut | Alien Rayblood | Alien Zagon | Carmeara | Celebro | Chaos Header | Commander Black | Dark Lugiel | Dark Zagi | Darrgon | Demon King Jackal | Exceller | Gatanozoa | Grakyess | Greeza | Gudis | Heller | Hudram | Juda | Jugglus Juggler | Maga-Orochi | Mensch Heit | Radical Destruction Bringer | Reugosite | Sphire | Trigger Dark | Ultra Dark-Killer | Ultraman Belial | Ultraman Tregear | Yapool

Secondary / Recurring Villains
Ace Killer | Alien Babarue | Alien Baltan | Alien Bat | Alien Guts | Alien Magma | Alien Mefilas | Alien Metron | Alien Nackle | Alien Nowar | Alien Pedan | Alien Temperor | Alien Sran | Alien Valky | Alien Zamu | Alien Zarab | Antlar | Bader Tribe | Cicada Human | Dark Mephisto | Darklops Zero | Bemstar | Black King | Deathrem | Delos | Destrudos | Doragory | Eleking | Etelgar | Galberos | Gan Q | Golza | Gina | Gomora | Grand King | Grozam | Gudon | Kei Fukuide | Kemur | Kodalar and Kilazee | Kyrieloid | Lunaticks | Melba | Mold | Nonmalt | Nova | Red King | Reibotas | Roygard | Sadola | Saki Mitsurugi | Telesdon | Tyrant | Ultraman Orb Dark | Vakishim | Verokron | Zetton (Zett) | Zogu

Minor / Movie Villains
Alien Baladon | Alien Barossa | Alien Bat | Alien Gapiya | Alien Godola | Alien Hipporito | Alien Icarus | Alien Keel | Alien Markind | Alien Mijir | Alien Monera | Alien Nuaza | Alien Regulan | Alien Salome | Alien Shamer | Alien Shaplay | Alien Tarla | Armored Darkness | Bakubarba | Beast the One | Beatstar | Bemular | Bezelb (Queen Bezelb) | Biranki | Bizorm | Black Silhouette | Bogar | Camearra | Chaosroid | Chaos Ultraman | C.O.V. | Darramb | Dark Faust | Dark Mephisto (Zwei) | Dark Lucifer | Darkgone | Deathfacer | Delacion | Dogyuh | Doctor Psychi | Evil Tiga | Evil Trigger | Ezmael | Gakuzom | Gamos | Gargorgon | Giranbo | Gillvalis | Gomess (S) | Guar | Hudra | Iaron | Inpelaizer | Jamila | Jasyuline | King Myra | King of Mons | Luganoger | Megaflash | Metal Organisms (Apatee | Algyuros | Meemos) | Menjura | Mezard | Murnau | Nature Control Machines (Tenkai | Enzan | Shinryoku) | Peginera | Phantom Ultraman Agul | Roberuga | Robot Chief | Robot Commissioner | Sandros | Shinigami/Zebub | Snake Darkness | Waroga | Zaigorg | Zamsher | Zoiger | Zombayu

Gondo Kihachi | Hiroya Narumi | Kaji | Keigo Masaki | Leyrah (Zabil | Leyrah Ibra) | Mai Yuki | Mitsuhiko Hirukawa | Mushitaro Kuri | Norberg | Professor Nakagawa | Professor Nikaido | Professor Otomo | Yoichiro Matsunaga | Yuuji Tango

Other Media
Ultraman Tiga Manga: Makila | Alien Regulan
ULTRAMAN Manga/Anime: Ace Killer | Adad | Alien Adacic | Alien Bris | Alien Igaru Pigmon | Alien Kadder | Alien Nepenthes | Alien Pedan | Alien Robuton | Alien Woovelve | Ambassador Mephisto | Bemular | Black King | Leo Brothers | Valky

Ace Killer Squad | Alien Union | Belial Army | Belial Galactic Empire | Black Buster Corps | Dark Giants (Trigger) | Darkness Five | Empera Army | Four Heavenly Kings | Guar Army | Heller Empire | Interstellar Alliance | League of Darkness | Planet Invasion Union | Reionics Hunter | Star Cluster Council | Star of Darkness | The Kingdom | Villain Guild