Zero is a confident, heroic, fearless, and powerful Ultra, but also proud and hot-headed at times. Ultimate Zero was to have more wings on the back, but they were scrapped. Designĭue to how common the red color is among Ultra Warriors, blue was added as well to make him more attractive to new viewers. Shining Ultraman Zero was initially to be called 'Absolute Zero' (アブソリュートゼロ Abusoryūto Zero), though the idea was rejected. Yuji Kobayashi revealed that the reason he named the character 'Zero' was to symbolize the 'restart of Ultraman's story from scratch.' The suit had a separate mold from the original Zero while the orange tubes were portrayed to be able to expand and contract themselves. It was initially planned to have a sharp design but producer Junya Okabe proposed a daring appearance.

Because of the difficulty in designing Zero, Tector Gear Zero was made first to hide his original appearance. His Tector Gear Zero form was meant to be called Armored Ax (アーマードアックス Āmādo Akkusu).

Zero's original Ultra Beam was planned to be named the Crosse Pressure Shot (クロスプレッシャーショット Kurosu Puressyā Shotto), which was fired in the 'X' pose. However, this decision was canceled, he was renamed ' Ultraman Zero' and his body was partially colored blue as well. The Sluggers could also fuse into a bow and arrow, which was later implemented into Ultimate Zero. His Zero Sluggers were originally called the Double I Sluggers and he had several different powers from what his base form currently has, such as a flame-covered dash. Ultraman Zero was originally going to be called by the initial draft name Ultraseven Ax (ウルトラセブンアックス Urutorasebun Akkusu) by Masayuki Gotoh and would have resembled an all-red version of his current appearance, minus his Color Timer in earlier concept art. Ultraman Zero's earlier design, which was to be called Ultraseven Ax 6.5 Ultraman Hit Song History: New Generation Chapter.6.1 Ultraman Hit Song History: New Hero Chapter.3.22 Ultra Galaxy Fight: The Destined Crossroad.3.20 Ultra Galaxy Fight: The Absolute Conspiracy.3.18 Ultra Galaxy Fight: New Generation Heroes.3.17 Ultraman Geed The Movie: Connect the Wishes!.3.13 Ultraman Orb The Movie: Let Me Borrow the Power of Bonds!.3.11 Ultraman X The Movie: Here He Comes! Our Ultraman.3.9 Ultraman Ginga S The Movie: Showdown! The 10 Ultra Warriors!.3.5 Ultraman Saga: Zero and Ultra Brothers Pop Out! Hyper Battle!.3.4 Ultraman Zero Gaiden: Killer the Beatstar.3.3 Ultraman Zero The Movie: Super Deciding Fight! The Belial Galactic Empire.3.2 Ultra Galaxy Legend Gaiden: Ultraman Zero vs.3.1 Mega Monster Battle: Ultra Galaxy Legends The Movie.

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