Subtitle: Steel Dragon (鋼鉄竜 Kōtetsu ryū)
A mysterious man in black, who was really an Invader in disguise, sneaks into the SGM headquarters to steal photos of another Invader and of their spaceship they were taken by Kyotaro Kagami. Kyoraro chases after the Invader to the city where the police and the SGM were at to deal with a giant spaceship in the sky. The Invader tries to get the attention of the space ships, but the police took chase. When the police had the Invader cornered, the spaceship helps him out by shooting down a ray that covered only him and turn him into the monster Iron. Iron showed his strange alien powers, and easily began destroying the town he was in. When Kyotaro arrived, he saw the SGM are in trouble. Before he could help out, he hears his father’s voice, telling him to transform into Mirrorman. Using the mirror-pendant he received from the 2nd dimension and a car’s side mirror, Kyotaro transformed into Mirrorman for the first time. After a short battle, he quickly finished off Iron by using his Mirror Shot attack on Iron's chest killing him instantly, Iron then began to bleed a sickly green blood and then went up in viridescent flames.
- Iron's cry is altered Gomora roar.
- Iron would later inspire the mirror demon Shiyu, and the alien general Iaron.
- Design: Yoshiaki Yoneya
- His design motifs for Iron where horseshoe crabs,stingrays and Plooma.
A third Iron, known as Iron III (アイアン3代目 Aian Sandaime) appeared in episode 15 of Mirrorman. He was actually an illusion created by Jabala.
- Powers and Weapons
- Laser Beams: Iron can attack by firing yellow and red beams from the red part of his head.
- Fire Breath: Iron can breath fireballs 300,000 degrees hot.
- Tail: The tip of his tail has scissor like pincers.
- Tail Ray: Iron's tail can fire a red ray from its tip.
- Brute Strength: Iron has immense strength.
- Teleportation: Iron can teleport.
|Mirrorman Kaiju & Seijin|
|Iron | Kitty Fire | Darkron | Multi | Noppera-bō | Inbera | Kitty Fire II | Gold Satan | Iron II | Multi II | Invaders | Gravity Machine | Zailas | Shinjuku Rose | Gold Satan II | Noah | King Zaiger | Iron III | Kitty Fire III | Zailas II | Jabala | Kinder | Chamelegon | Aroza | Big Eye | Sphenodon | Darkron II | Taigan | King Wonder | Androsaurus | Coldon | Haebun | Gokibura | Mothgojira | Dustpan | Snake King | Harigojira | Killergon | Gorgosaurus | Mayasaurus | Arigeida | Killersaurus | Pair-Mons King | Mogura King | Smoke Ness | Pair-Mons King β | Gorgosaurus β | Mayasaurus β | Halley Jack | Androsaurus II | Androsaurus Jr. | Magumagon | Zangani | Shadow Mons | Teroringa | Invesaurus | Ghost | Boasaurus | Black Gon | Red Mons | Giranda | Borezaurus II | Iezu | Eletrikzaurus | Dead King|
|Mirror Fight Kaiju & Seijin|
|Mirror Fight||Iron | Kitty Fire | Darkron | Noah | Aroza | Zailas | Multi | Inbera | Kitty Fire II | Gold Satan | Iron II | Multi II | Gravity Machine | The Invaders | Gold Satan II | Korudon | King Zaiger | Jabala | Kinder | Chamelegon | Sphenodon | Darkron II | Taigan | Ozma | Big Eye | King Wonder | Androsaurus | Dustpan | Snake King | Harigojira | Kiragon | Arigeida | Sea Killersaurus | Pair-Mons King | Gorgosaurus β | MoleKing | Invesaurus | Shadow Mons | Eletrikzaurus | Dead King | Boasaurus | Teroringa|
|Mirror Fight 2012||Alien Reguran | Iaron | Dorigorus | Dorako | Aroza|