The Rider under the moonlight

-Empress Form
-MeSyTryKi Empress Form

Items Kiva-la have:
-Machine Eclisper

Others:
-Story settings

Here's a bio, for both Kiva-la and the Eclisper:

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Rider:
Kamen Rider Kiva-la (仮面ライダーキバーラ)

"Just who the heck are you?" "Kamen Rider...Kiva-la" - Natsumi's respond to the mooks who didn't know who she is

Color:
-Armor/Suit: White, Blue, Silver, Black
-C-Eyes: Red
-O-Signal: Clear Yellow

Info:
This is the Rider form Natsumi Hikari (光 夏海) can transforms with the help of Kiva-la, a Kivat.

While its design is similar with that of Kamen Rider Kiva, the colors on the suit are completely differents: Instead of red and black Kiva has, Kiva-la has opposed colors: blue and white.

Whenever she needed, she can summons and arms with the Kiva-la Saber (キバーラサーベル).

During a fight with a Fangire who is a part of the remnant of Dai-Shocker, Kiva-la the Kivat (who is not mature enough to use fuestle), due to her will to help Natsumi, awaken Kiva-la's other finisher: Darkness Moon Break. Since then that finisher become Kiva-la's primary finisher.

Finisher:
-Sonic Stab (ソニックスタッブ) - A Rider Slash Finisher. Doing so allows enables her to sprout energy wings while attacking similar to Kiva Emperor Form's Emperor Moon Break. She can only initiate this finisher when is armed with Kiva-la Saber.

-Darkness Moon Break (ダークネスムーンブレイク) - Kiva-la's second finisher. When initiates Kiva-la the Kivat will producing the whistle-like sound, turning the sky into night with full moon and materializes and opens the Hell's Gate on Kiva-la's right leg. Then Kiva-la will delivers the powerful kick with her right leg in any means (although mostly it is flying-kick-variation) and kill the enemy while creates a crater in the shape of a bat's wings on any surface upon contact.

Vehicle:
Eclisper (エクリスパー)

Tech Specs:
-Power Output: 470 bhp at 8200rpm
-Weight: 67 kg

Info:

The Eclisper is made and given by Motorbat the 16th to Natsumi during the time when she travel around on the other Kiva AR world.

Its chassis is made of Kivanium, a type of alloy created by the Kivats that is lighter and stronger than the other alloys. The Eclisper is a living motorcycle, possessing the brain of a horse monster in its upper cowl. When running at high speed, it generates the Shadow Veil (シャドーベール) to hide itself from plain sight.

It can be summons by Kiva-la the kivat whenever Natsumi needed it.

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I do not own Kamen Rider series, all of these are belong to its deceased creator Shotaro Ishinomori, Ishimori Production and Toei Company.