|This article is about a/an companion/transformation device in Kamen Rider Kiva.|
|Villain Type:||Artificial Kivat/Companion (first), Double agent (current)|
|Season:||Kamen Rider Kiva|
|First Appearance:||Kamen Rider Kiva: King of the Castle in the Demon World|
|Last Appearance:||Kamen Rider Kiva: King of the Castle in the Demon World|
|Number of Episode|
- "Graceful yet Violent."
- ―Rey Kivat's motto before battling an enemy[src]
Rey Kivat (レイキバット Rei Kibatto?) is an intelligent computer created by 3WA. He can transform Takato into Kamen Rider Rey. It is not an original Kivat because it was created by humans. It also blows the Key Fuestle to unseal Kamen Rider Rey's main weapon Gigantic Claw.
Rey Kivat is calm and passionate, but does not enjoy destroying his enemies, unlike Arc Kivat.