Alien Orion
Alien Orion
Home world: Planet Orion
First Appearance: Ultraman Ace episode 25 "The Pyramid Is a Choju's Nest!"
Latest Appearance: None
Height: Unknown
Weight: Unknown
Category: Seijin
Affiliation: Sphinx (Pet)
Yapool (Possible master)
Roar(s): TBA

Alien Orion (オリオン星人 Orion Seijin) was an alien that appeared in episode 25 of the television series, Ultraman Ace.

Subtitle: Ancient Alien (古代星人 Kodai Seijin)


  • Height: Unknown
  • Weight: Unknown
  • Origin: Planet Orion


Ultraman Ace

13 thousand years ago, the Alien Orion race invaded Earth when humanity at the time was still a primitive race, but after a great flood on Earth, they were forced into a deep slumber in their pyramid. Due to this, humanity regained control of their planet once more.

In the present day, they awakened, spreading toxic gases to make Earth suitable for their kind, re-emerging their pyramid base and sent one of their kind, Michiru (ミチル) to stop TAC from interfering. Michiru had infiltrated the base and tried to destroy V9, their ultimate weapon that could destroy the Orion's pyramid. However, Yuko disarmed it and pursued Michiru before she was captured by her kind. The Orion race as well had no need of Michiru and expelled her. Their pyramid opened and reveal their ultimate choju: Sphinx. While Sphinx was sent on a rampaging spree, the Orions had Minami crucified on the top of their pyramid to ensure that they would stop the V9 from attacking them. Fortunately, Hokuto piloted a TAC jet and reunite with the imprisoned Minami to summon Ultraman Ace. Michiru later played her flute to distract Sphinx but the Orions killed her and get Sphinx back to its senses. After Ace killed Sphinx, he lifted the Orions' pyramid and destroyed it with Metallium Ray, killing them as well. Ace brought Michiru's corpse and place it nearby the Orion Constellation, as it become a new star.


  • Voice actor: Mahito Tsujimura (whom also voiced the original Ultraman in Ultraman Ace)
  • Actress (Michiru): Yoko Tadokoro
  • It is possible that their relation to the choju Sphinx is due to having made a deal with Yapool, given that both aliens are at the same ages.
  • The mask of Alien Orion is a repurposed Old Man mask from one of Yapool's disguises. 

Powers and Weapons

  • Pyramid: Alien Orion had a pyramid as their base, where they used it for protection against a great flood that had strike the Earth before.
  • Human Disguise: Alien Orion can disguise themselves as humans.
  • Sphinx: Alien Orion can command and control this choju.
    • Whistle: Michiru had a special whistle that can be used to control Sphinx.


The Orion races live by inhaling a specialized toxic gas that contained extraterrestrial metals that would be hazardous to humans (this gas caused their red blood cells to multiply rapidly). If they didn't inhale this gas for a long time, they would suffer a serious headache and die as a result.


Ultraman Ace Kaiju & Seijin
Verokron | Yapool | Chameleking | Vakishim | Garan | Aribunta | Giron Man | Brocken | Alien Metron Jr. | Doragory | Muruchi II | Gammas | Zaigon | Alien Antira | Unitang | Sabotendar | Barabba | Ace Killer | King Crab | Cattle God | Cowra | She-Devil | Hotarunga | Black Pigeon | Android Couple | King Kappa | Zemistlar | Aprasar | Aprasar Fairy | Space Mask | Black Satan | Giant Yapool | Mazaron Man | Yojo | Mazarius | Alien Orion | Sphinx | Alien Hipporito | Lunaticks | Undergroundmon | Gitagitanga | Red Jack | Baktari | Coakes | Bad Baalon | Kaiteigagan | Dreamgillas | Soundgillar | Machless | Snowgiran | Namahage | Alien Fire | Firemons | Alien Steal | Kaimanda | Shishigoran | Iceron | Woo II | Fubigirara | Onidevil | Gasegon | Daidarahoshi | Hanzagiran | Verokron II | Yapool Woman | Univerlages | Aquarius | Alien Revole | Signalion | Geegon | Alien Simon | Jumbo King