Ultraman Dual (ウルトラマンデュアル Urutoraman Dhuaru) is the titular character of the novel, Ultraman Dual. There are in fact two Ultraman Duals, who are identical in appearance.
Information on the Dual I is scarce, all that is known is that he is already deceased by the time of the story, and that he left the Land of Light due to the situation there with Invaders.
A salary man named Shin Tadashi. He previously worked at the shipping company, Vicki's Work before joining the Land of Light Enclave.
After undergoing the Ultra Operation, he took the appearance of Dual, gaining red and black stripes, a sign of his talent as a warrior most likely due to his school days as a delinquent.
- Height: Human to Giant (True height is unknown)
- Weight: Unknown
- Age: 27 years old
- Home: Earth
- Flight Speed: Unknown
- Running Speed: Unknown
- Transformation Item: Dual Change Charger
- Short Energy: A power that dwells inside of him and has high applicability. He uses it for his various techniques by changing it into various forms.
- Short Strike (ショルト・ストライク Shoruto Sutoraiku): A beam fired from the left hand outstretched in front of the chest. It is described as a Specium type special light beam
- Short Shot (ショルト・ショット Shoruto Shotto): Beams emitted from the fingertips of the left hand.
- Short Powder (ショルト・パウダー Shoruto Paudā): The energy in the body is converted to powder form and scattered around the user to illuminate the area.
- Despite his power growing through the story, Dual (Shin) was stated by the author to pale in comparison to the Ultra Brothers, who are considered Elites among Elites.