|This article is about a/an form in Kamen Rider Zi-O.|
GaimArmor (鎧武アーマー Gaimu Āmā) is a Kamen Rider Gaim-based form accessed using the Gaim Ridewatch, invoking Kamen Rider Gaim's Orange Arms. When summoned, it takes the form of a giant Gaim head before attaching to the user and transforming into armor. Depending on whether it is used by Zi-O or Geiz, its visor spells out "Gaim" (ガイム Gaimu) in katakana or "Gaim" (がいむ Gaimu) in hiragana respectively.
- "On parade on the flowering path!"
- ―Sougo Tokiwa attempting to channel Kouta Kazuraba[src]
On December 8th 2018, Zi-O assumed the GaimArmor alongside Geiz WizardArmor to fight Another Ghost. When the Time Jacker Heure attempted to intervene, Zi-O summoned the Kodama Suika Arms to ward him off. Soon after, Geiz pointed out that it was more appropriate to use Ghost's power and so loaned him the Ghost Ridewatch to assume GhostArmor.
Facing Another Blade, Zi-O assumed GaimArmor to match the Blay Rouzer-derived sword she wielded, successfully fighting her off. As Another Blade was actually Amane Kurihara, Hajime Aikawa stepped in to defend her as Kamen Rider Chalice. After a brief skirmish, Zi-O was forced out of his transformation by Chalice's Spinning Dance.
- "(Digital beeping) Gaim!"
- ―Activation announcement[src]
- "Rider Time! (horagai trumpet to modernized Japanese music) Soiya! Gaim~!"
- ―Transformation announcement in the Ziku-Driver's right-hand slot[src]
- "(Right-hand Ridewatch's announcement)! Armor Time! (modernized Japanese music) Soiya! Gaim~!"
- ―Rider Armor transformation announcement[src]
- Squash Time Break (スカッシュタイムブレイク Sukasshu Taimu Bureiku): This finisher has two variations.
- Zi-O slashes the enemy with the Daidaimaru Zs before trapping them in an badly drawn orange sphere.
- Zi-O slashes the enemy with the Daidaimaru Zs, causing him to split.
- The "giant head" form GaimArmor takes before transforming into armor references Armor Parts, specifically the Legend Rider Arms such as Wizard Arms or Gaim Arms.
- Gaim's face forming the chest specifically references 1go Arms.
- Similar to Another Gaim, the armor's design leans towards Kachidoki Arms, but with the weapon access of Fresh Orange Arms instead.
- Kamen Rider Zi-O
- Another Gaim - The result of using the Another Gaim Watch