"You received the light. This is... your mission!"

―Mephisto's last words, as Nexus ends both clone and template
Dark Mephisto
Dark Mephisto Render
Human Host/Form: Shinya Mizorogi
Height: 50 m
Weight: 50,000 t
Age: less than a year
Home world: Planet Earth (N universe)
Voice actor(s): Shundo Mitsutoshi
Suit actor(s): Hideyoshi Iwata
First Appearance: Ultraman Nexus Episode 14: Mephisto
Last Appearance: Ultraman Ginga S Movie Showdown! The 10 Ultra Warriors! (2015)
Number of Appearances: 7 (Nexus)
1 (Movie)
Race: Dark Ultra
Status: Deceased
Family: Dark Zagi (Creator, Master),
Dark Giants
Affiliation: Dark Side (Space Beasts and Dark Giants)
Ultraman Nexus (The Light)
Etelgar (Eteldummy)

Dark Mephisto (ダークメフィスト Dāku Mefisuto?) is the Dark Ultra form of Mizorogi Shinya, the former Deputy Captain of the Night Raider Division of TLT and a mentor/love interest to Nagi. 


  • Giant of Darkness (闇の巨人 Yami no Kyojin?)
  • Black Devil (黒い悪魔 Kuroi Akuma?)


Ultraman Nexus

Becoming Human

Shinya Mephisto Meet

Mizorogi and Mephisto meet

A year before the start of the series Mizorogi was the former Deputy Captain of the Night Raider Division of TLT. He was very close to Nagi and the two had uncanny ability to sense space beasts even when TLT's equipment couldn't. Around this time Mizorogi was beginning to have dreams and visions of strange ruins. However, one night he and Nagi went into a building alone facing the Zombie Variant of Beast Humans, corpses animated by some dark power as a puppets. He and Nagi made a pact to kill the other if they fell under the creature's power, switching dog tags to seal the promise. Mizorogi proceeded deeper alone until he met a dark giant, one he mistook for just another Beast. This one, however, was immune to his cannons and instead of fighting him convinced Shinya to merge with it. Stating that its name was Dark Mephisto, it spoke of its ideology: there was no good and evil, only power. Fusing with Mizorogi, it passed this philosophy on to him, creating a terrible force of evil.

Battling Nexus

Ultrmn Nxs vs Mphst

Nexus Vs. Mephisto

An even higher-ranking dark Ultra, Dark Mephisto was the mastermind behind Dark Faust and Nosferu. Joining with former Night Raider Deputy Captain Mizorogi, the villain watched on from the sides, playing the humans as puppets for his own entertainment. After Faust was destroyed, Mephisto continued to use Riko, using her image to continuously harass and confuse Komon in order to make Komon his next slave. Mizorogi eventually called on Mephisto’s true form, but was challenged by Nexus. The two forces collided for the first time, but a clear winner wouldn’t come to be. When Nosferu was destroyed, a young girl that the beast kept as a hostage was wounded. Laughing, the vile giant vanished as Nexus and the Night Raiders looked on in horror at what had happened. Mephisto had manipulated events to shame and hurt the Raiders for his own amusement.

When Nosferu returned yet again, Mizorogi called on Mephisto's power once again before Nexus could attack the space
Nexus VS Mephisto
beast. Quickly creating a darkness field, the tyrant of evil began to hold his own against the red and silver Ultraman. Dodging its attacks and utilizing its own powers, the battle between the forces of good and evil raged.

The two giants battled back and forth until Nexus hit the fiend with his core impulse, severely wounding the red and black villain. Mephisto retreated, but continued to taunt Komon with memories of his dead girlfriend with hopes of making him turn to the dark side. This plan, however, didn't work. When in a stand off with Komon, Nagi, Jun, and several of the Night Raiders, it seemed the alien was invincible until Nagi shot her old lover in the back. Unprotected, Mephisto was defeated, but not dead.

Mizorogi came up with a new scheme to kill off Ultraman and open the Gates of Darkness, allowing him his wish of ultimate power. Unleashing Kutuura’s wrath, the villain left clues for the Night Raiders and Ultraman to follow until the time of final battle came. Inside the Death Land, after Ultraman fell defeated by Kutuura, the Night Raiders arrived and defeated the space beast.

"In power...I have the ability to rule the future.You, on the other hand, are wounded. There's no way you can beat me!"

―Dark Mephisto, episode 24
Mephisto v NR

Mephisto faces the Night Raiders one last time

Mizorogi transformed into Dark Mephisto and challenged the Night Raiders themselves! After being hit, and withstanding, their Ultimate Vanisher, Nexus suddenly revived. The hero, however, was still weakened. He managed to fight through Mephisto’s attacks, but the villain still had the upper hand.

A new plan was made to recharge Ultraman by modifying the Ultimate Vanisher. The beam of light hit Nexus’ color timer, recharging him with energy(even though they thought he was dead at first)! The fight between the forces of good and evil were once again raged in the sky as they traded blow after blow. Watching on, the Night Raiders bore witness to the two giants firing their beams! The two streams of light smacked into one another, engulfing them both in a huge explosion! Through the flames, both warriors continued their battle until the combined energies completely vaporized them both! Mephisto was gone, but he’d find yet another way to return.

Nexus BeamClash

Nexus and Mephisto's final battle

When he did return, however, Mizorogi was without his memories. Traveling the streets of Japan looking for answers, it was only time before the Night Raiders captured the confused soul. When told of what he was and what he did, Mizorogi was lost and depressed. Mizorogi managed to escape, recovering his memories. Taking a hostage, he fled TLT, but ended up bonding to her as his newfound guilt grew within him. Meanwhile ,he dark villain that made the original Dark Mephisto would forcibly corrupt a new soul: Hiroyuki Misawa, a member of the memory police.

Mizorogi Ren

Mizorogi protecting Ren from Zwei

When Misawa revealed his new self as Dark Mephisto Zwei, he attacked and nearly killed Mizorogi. Fleeing from the giant, Komon and Nagi watched on as Ultraman Nexus’ power was drained by the giant. However, as the villain prepared to finish off the giant of light, Mizorogi called upon the light, taking the form of Dark Mephisto again. This time, however, the human had complete control of himself. He was no longer a puppet and now used this destructive force for good.

Saving Nexus, the two dark ones clashed in a show of power, but Shinya's wounds came to play, slowing him down. Zwei stabbed his blades into Mephisto’s gut, the dark giant was about to fall. Yelling for Ultraman to fire as he spun around and held the other tight, the end of this power and life was soon to be. Ultraman Nexus fired his Arrow-Ray Storm, killing Dark Mephisto Zwei while Mizorogi reverted to his human form. Sharing a few last words with Nagi, he dies in her arms, having atoned for his past sins.

Ultraman Ginga S Movie Showdown! The 10 Ultra Warriors!

Dark Mephisto (Eteldummy)

An Eteldummy of Dark Mephisto

When Nexus, Cosmos MaxMebiusZero & Ginga Victory arrived at the first floor of Etelgar's Castle an Eteldummy (エタルダミー Etarudami?) of Dark Mephisto was created to stop them from reaching Etelgar. He fought against Nexus while the others left to find to find Etelgar. The Eteldummy was destroyed by Nexus's Junis Form with his Over-Ray Storm. Ultraman Ginga S Movie Showdown! The 10 Ultra Warriors!


Mizorogi holds the Dark Evoler in front of him and pulls it open. The central stone shines a purple light that covers his body. The transformation scene is an image of Mizorogi's face covered in purple light, the image cracks and Mephisto pops out with a purple light behind him. After escaping from the dark influence, Mizorogi transforms into Mephisto by absorbing light energy around him and using will power to transform. This time the transformation scene is an image of Mizorogi's face covered in yellow light, the image cracks and Mephisto pops out with a purple and yellow light behind him. turn.

Techniques and Abilities

Body Features

  • Eyes: Mephisto's eyes can clearly in the dark of night or the Dark Field. Unlike most Ultra eyes his are black.
  • Energy Core: Mephisto's color timer, as a dark ultra his is black and flashes red when he is injured.
  • Armed Nexus: The bracers on his arm, they work in a similar way to Nexus'.
    • Mephisto Claw: The Armed Nexus on Mephisto's right arm is modified to turn into a two pointed claw. It can be used as a melee weapon and as an Armed Nexus can be used to fire energy attacks. Mephisto erects his Dark Field using this weapon.
  • Ultra Armor: Mephisto's skin is resistant to fire and laser beams like any ultra armor.


Ray Techniques

  • Dark-Ray-Schtrom: Mephisto can emit a + style purple and black energy beam from his left hand, comparable to Nexus's Over-Ray Storm.
  • Dark Feather: Mephisto can launch dark arc shaped bursts energy exactly like Nexus's Phase Feather.
  • Dark Grenade: Mephisto can fire a strong explosive light bullet from his right hand. Can be used without the Mephisto Claw. Used to take down Nexus after he used Broad Particle Feathers.
  • Dark Ray Cluster: Mephisto has his own version of the Dark Cluster attack, but his energy balls track the target where ever it goes.

Other Techniques

  • Mental Abilities: Mephisto can play with people's minds at his desire and speak through the weak minded. He can also show people hallucinations. He can also make humans experience the memories and sight of others. It is also shown that Mizorogi can see and hear what happens inside a Meta-field even when he's outside
  • Beast Humans: Mephisto can create or at least control beast cells, upon injecting them in a person they can be shown illusions so the beast can feed on negative emotions and eventually overtake the human. When placed in a dead person they became puppets for him to control. The Deunamist's Blast Shot has a special blast to expel and destroy Beast cells safely.
  • Dark Defensor: Mephisto can erect a barrier with one hand or both, resembling a purple pool of water. He can also perform this in human form.
  • Invisibility: Mephisto can turn invisible, like Faust.
  • Mephisto Claw: Like Nexus, Mephisto has Armed Nexus on his arms, the one on the right is modified to transform into a large dual claw on his right wrist that can stab and slash into enemies and launch a variety of energy attacks. It is also how he erects his Dark Field in Ultra form.
    • Dark Wave Shift: Similar to Dark Faust's Dark Field Mephisto can create it human form, inside the phase he can create a dark energy barrier at will around himself or his allies when in human form. His Dark Field also has a green tinge to it when forming. He can also uses the Mephisto claw and injecting it to the ground to form it. Unlike Faust, Mephisto has generated his Dark Field without Nexus first creating his.
      • Dark Field:Mephisto's dark field,it is similar to Faust,however he can create it in human form as well and can erect using the Mephisto Claw.It strengthen dark beings and weaken beings of light.
    • Mephisto Shot: Fires green energy blasts from the Mephisto claw.
      • Mephisto Hyper Shot: Fires more powerful shots, they are red in Colour.
  • Extraordinary Jumper: Mephisto has little trouble jumping hundreds of feet into the air.


  • It is unknown which of Zagi's giants was created first but certain evidence and dialogue implies that Mephisto was created first.
  • In the Tsuburya All Monster Photobook Mephisto has the second title of Black Devil.
  • Mephisto's design motif is that of the Grim Reaper.
  • Mephisto is the first male evil Ultra to have a shown transformation item.
  • Mephisto was the longest living Dark Ultra in the series, excluding Dark Zagi
  • Similar to Alien Mefilas, Mephisto's name is taken from a German book, Mephistopheles.
  • It is deliberately ambiguous how much of the actual giant Mephisto was left after his defeat at Himeya's hands. Mizorogi's much more subdued and peaceful nature after his return implied the giant was dead. However, his powers, voice, and mannerisms all return after Mizorogi regains his memories, implying Mephisto also chose to redeem himself.
  • Mephisto is the second Ultra to be redeemed from darkness, the first being Ultraman Tiga. However, his redemption is on-screen.


Ultra Hero Series

UHS Nexus 5
  • Dark Mephisto (2004)
    • Release date: December 2004
    • ID Number: N4
    • Price: 700 yen
    • JAN/ISBN: 4543112254764
    • Materials: PVC
Released as part of the Ultra Hero Series N lineup, Dark Mephisto is a 6-inch soft vinyl figure with 3 points of articulation, and is entirely molded in red and sports black and silver (and some gold) paint operations. As with most Ultra Hero Series releases, Dark Mephisto comes with a collectible foldable data card.

Action Sound

  • Dark Mephisto (2005)
    • Release date: February 2005
    • Price: 1512 yen
    • JAN/ISBN: 4543112320162
    • Materials: PVC, ABS
Action Sound Dark Mephisto is a larger-sized figure that features various sound gimmicks.

HG Series

  • Fight! Dark Mephisto Chapter (2005)
    • Release date: February 2005
    • Price: 200 yen
    • JAN/ISBN: 4543112296740
    • Materials: PVC
Released as part of the 43rd HG Ultraman Series lineup, this Dark Mephisto is a smaller capsule figure.

Candy Toys

Ultraman Nexus Kit

  • Transform Dark Mephisto (2005)
    • Release date: January 2005
    • Price: 200 yen
    • JAN/ISBN: 4543112287717
    • Materials: ABS
Dark Mephisto's arm parts and transformation device is also available as part of the Ultraman Nexus Kit candy toy as a buildable kit with sticker for detail, similarly to Bandai's Gunpla. Each kit had 3 releases: 1 left wearable bracelet (listed as Arm Mephisto) with firing projectile (which is mean to represent Dark-Ray-Schtrom), 1 right wearable Mephisto Claw bracelet, and a Darkevolver.

Kuttsukun Desu figures

  • Kuttsukun Desu Ultraman Nexus (2005)
    • Release Date: January 2005
    • Price: 100 yen
    • JAN/ISBN: 4543112292605
    • Materials: ABS, Magnet
Dark Mephisto is one of the few character magnets included in this line.



Ultraman Nexus and Mephisto vs Dark Mephisto Zwei-005:45

Ultraman Nexus and Mephisto vs Dark Mephisto Zwei-0



Ultra N Project Kaiju & Seijin
ULTRAMAN (2004) Beast the One | Zero (Mentioned)
Ultraman Nexus Pedoleon Klein | Pedoleon Groß | Pedoleon Fliegen | Beesectar | Bugbuzun | Bugbuzun Brood | Bugbuzun Growler | Galberos | Dark Faust | Lafleya | Nosferu | Beast Human | Dark Mephisto | Galberos II | Arakunia | Frogos | Golgolem | Kutuura | Grantella | Banpira | Lizarias | Lizarias Growler | Dark Mephisto Zwei | Mega Flash | Izmael | Dark Zagi
Unused Ultraman Nexus Monsters Unused Space Beasts from Ultraman Nexus
Ultraman Ginga Kaiju & Seijin
Ultraman Ginga Alien Valky | Black King | Thunder Darambia | Kemur Man | King Pandon | Ragon | Doragory | Alien Nackle Gray | Dark Galberos | Zaragas | Red King | Antlar | Jasyuline | Super Grand King | Dark Lugiel
Ultraman Ginga: Theater Special Alien Icarus | Tyrant | Dark Zagi
Ultraman Ginga: Theater Special Ultra Monster ☆ Hero Battle Royal! Kanegon | Alien Baltan | Red King | EX Red King | Telesdon | Dorako | Gomora | Reionic Burst Gomora | EX Gomora | Mecha Gomora | Zetton | Miclas | Snowgon | Yametaranese | Alien Miracle | Mochiron | Alien Akumania | Evil Tiga | Gan Q | Chaos Ultraman | Zamusher | Zoa Muruchi | Chaos Ultraman | Chaosroid S | Chaosroid T | Chaosroid U
Ultraman Ginga EX Alien Magma | Zetton
Mountain Peanuts (Short story) Detton | Jamila | Nosferu | Android One Zero
Ultraman Ginga S Victorian | Alien Chibu Exceller | Android One Zero | Chiburoid | Shepherdon | EX Red King | Eleking | Alien Guts Vorst | Inpelaizer | King Joe Custom | Sadola | Gudon | Yapool | Vakishim | Gomora | Fire Golza | Gan Q | Five King | Bemular | Bemstar | Doragory | Verokron | Alien Akumania Muerte | Alien Metron Jace | Zoa Muruchi | Birdon | Alien Zetton Berume | Hyper Zetton | Vict Lugiel | Alien Valky | Alien Nackle Gray | Alien Icarus
Ultraman Ginga S Movie Showdown! The 10 Ultra Warriors! Etelgar | Five King | Alien Sran | Dark Mephisto | Alien Empera | Ultraman Belial | Dark Lugiel
Ultra Fight Victory Aribunta | Giant Yapool | Ace Killer | Victory Killer | Verokron | Vakishim | Doragory | Lunaticks | Shepherdon | Juda Spectre | Super Grand King Spectre

Ultra Warriors
Showa Ultras Ultraman | Zoffy | Ultraseven | Ultraman Jack | Ultraman Ace | Ultraman Taro | Ultraman Leo | Astra | Ultraman 80 | Ultraman Joneus | Ultraman Chuck | Ultraman Scott | Ultrawoman Beth
Heisei Ultras

Ultraman Great | Ultraman Powered |Ultraman Zearth | Ultraman Tiga | Ultraman Dyna | Ultraman Gaia | Ultraman Agul | Ultraman Neos | Ultraseven 21 | Ultraman Cosmos | Ultraman Justice | Ultraman Legend | Ultraman Noa | Ultraman Nexus | Ultraman the Next | Ultraman Max | Ultraman Xenon | Ultraman Mebius | Ultraman Hikari | Hunter Knight Tsurugi | Ultraman Zero | Ultraman Saga | Ultraman Ginga | Ultraman Victory | Ultraman Ginga Victory | Ultraman X | Ultraman Orb | Ultraman Geed
Other Ultras Superior | Father of Ultra | Mother of Ultra | Ultraman King | Elek | Loto | Amia | People of U40 | Hanuman | Yullian | Ultra Nyan | Ancient Giants of Light | Tiga's companions | Ultraman Boy | Ultraman Pict | Ultraman Nice | Ultra Kamen Rider | Ultra Idemitsujin | Ultraman Neko | Ultraman Ribut
Counterparts/Alternate Universe versions Ultraman (Neo Frontier Space Timeline) | Zoffy (Neos Universe) | Ultraman (Superior Universe) | Ultraseven (Superior Universe) | Ultraman Jack (Superior Universe) | Ultraman Ace (Superior Universe) | Ultraman Tiga (Superior Universe) | Ultraman Dyna (Superior Universe) | Ultraman Gaia (Superior Universe) | Ultraman Tiga (Ultra Flare Timeline)
Manga Ultras Ultraman The First | Zoffy Story 0 | Ultraseven Story 0 | Ultraman Story 0 | Ace Story 0 | Jack Story 0 | Leo Story 0 | Astra Story 0 | Taro Story 0 | Gorian | Zaji | Drew | Colorless | Flare | Rutia | Alphonne | Ars | Acura | Remodeled Ultras | Manga Tiga | Ultraman (ULTRAMAN)
Another Genesis Giants Blast | Ultraman | Ultraseven | Belial | Jack | Ultrawoman Ace | Taro | Luna and Cosmos | Tiga | Jean-Bot | Father Burai | GlenFire | Mirror Master | Leo | King
Imitation and Evil Ultras Imitation Ultraman | Robot Ultraseven | Ace Robot | Imitation Astra | Delusion Ultraseven | Imitation Ultraman Joneus | Ultraman Shadow | Evil Tiga | Imitation Ultraman Dyna | Terranoid | Imitation Ultraman Gaia | Imitation Ultraman Agul |Imitation Ultraman Cosmos | Chaos Ultraman | Chaosroids | Dark Faust | Dark Mephisto | Dark Mephisto Zwei | Dark Zagi | Fake Ultraman Mebius | Fake Hunter Knight Tsurugi | Imitation Ultraman Mebius | Ultraman Belial | Darklops Zero | Darklops | Robot Ultraman | Robot Zoffy | Robot Ultraman Jack | Illusion Ultraman Zero | Ultraman Geist | Ultraman Dark | Seven Dark
The Dark Giants Darramb | Hudra | Camearra

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