Zi-O's silver, red and blue-coloured Rider Armour, is themed after a watch, Katakana and Kamen Rider Build. The visor of this form spells out 'Build' in Katakana. In this form, Zi-O has the use of the Drill Crusher Crusher as well as the powers of the Rabbit and Tank Halfbodies via the empty Fullbottle-themed shoulders. This form debuts in Kamen Rider Build: Be The One.



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