|This article is about a/an transformation device/companion in Kamen Rider Kiva.|
- "Well, shall we go? Doron doron. (Jaa, ikimasu ka? Doron doron.)"
- ―Arc Kivat's first quotes[src]
Arc Kivat (アークキバット Āku Kibatto) is the transformation device and partner to Kamen Rider Arc. Arc Kivat is a mechanical Kivat created by the Legendorga for their leader to assume his rider form. When Kamen Rider Arc uses the Wake Up Fuestle (which resembles Rey's Key Fuestle in the movie), Kamen Rider Arc transform to Legend Arc and Arc Kivat also assumes Mecha Kivat (メカキバット Meka Kibatto) mode as his persona cast comes off and yells, "Go to Hell."
In the short amount of time he was seen talking, Arc Kivat is cheerfully sadistic, taking delight in destroying Arc's enemies.