- "Kivatte Ikuze!"
- ―Kivat's quote before battling
Kivat-bat the 3rd (called Kivat for short) is a supporting character in Rosario Kiva serving as the Kivat partner and transformation device of the protagonist, Kamen Rider Kiva.
Kivat is a yellow and black Kivat with large red eyes. He is distinguished amongest others of his race possessing two family heirlooms, the green Demon Imperial Stone on his forehead and the Kivat Persona on his face. His wings are onrnated with Lucifer Gold.
Kivat is a solid character with a dry wit, tending to have a bitter attitude. Despite this he still cares deeply about his partner Wataru forming a partnership with him since infancy and giving tips during battle against others. He likes Moka because he knows that she likes Wataru and make her come to Castle Doran to clear the air on chapter 21.
As a Kivat, he possesses Demon Imperial Powers like the Active Force which he can infuse into others by biting with his Active Fangs which summons the Kivat Belt where he is then placed upon for the transformation into Kiva. He is also able to blow on Fuestles to summon items or other things like Castle Doran. His eye color changes depending on what form Kiva is in.
Aside from being Kiva's power source, Kivat possesses a technique called Kivat Cutter with his Lucifer Gold adorned Kivat Wings which can cut through opponents.