This article is about a/an set of alternate forms in Kamen Rider Ryuki.
Blank Form (ブランク体 Buranku-tai) is the default form of the 13 Kamen Riders when they lack a Contract Monster. It is much weaker than their standard form, though it is enough to keep them from disintegrating in the Mirror World.

Only Ryuki and Ouja's Blank Forms have been seen. Ryuki began the series in Blank Form before he contracted Dragredder, and he also reverted back to this form when his Contract Card was stolen by Kamen Rider Gai. Ouja was reverted to Blank Form in Kamen Rider Ryuki: Episode Final after Genocider was destroyed by Kamen Rider Ryuga.

Knight's Blank Form is shown as a concept art in the book Kamen Rider Art Collection Hero Hen.

Strangely, in the A.R. World of Ryuki arc in Kamen Rider Decade, the exclusive 14th Rider Abyss was not shown to revert to a Blank Form when his Contract Monster Abyssodon (the combination of Abysslasher and Abysshammer) was destroyed. Super Trick of the Real Criminal

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