Kamen Rider Kiva-la

Kamen Rider Kivala is a Kamen Rider appearing in Kamen Rider Decade: Final Chapter. Similar to other riders before her, Kivala is an original Kamen Rider from an A.R. World. Though unlike them, Natsumi does not come from an A.R. World but uses powers from one.

Natsumi Hikari
Natsumi Hikari, referred to as Natsumikan by Tsukasa and Natsumelon by Daiki, is a young woman who works at the photo studio under her grandfather, Ejiro Hikari, having lived with him since childhood. Prior to the series, Natsumi was a member of the Taigaku Club or TG Club for short with friends that dropped out of high school to find their own answers in life. Unfortunately they never carried it out and went back to high school, promising to meet each again. At the start of the series Natsumi has nightmares about Kamen Rider Decade and later finds his belt and cards, giving them to Tsukasa. Knowing the dangers, Natsumi decides to accompany him on his journey.

She occasionally uses the Hikari Family Secret Laughing Pressure Point to keep Tsukasa and others in line. It's possible she has feeling or cares for Tsukasa's well being, hinted during her talk with Yuusuke. Despite Narutaki's offer to save her, Natsumi choose's to stay with Tsukasa until the end of their. However, she starts to worry after hearing from Narutaki that Tsukasa's actions are actually destroying the worlds rather than saving them. In the World of Shinkenger, she assure's that the Hikari Family Studio is Tsukasa's home. In the World of RX she is attacked by Apollo Geist's, Perfecter, draining her life until it was saved by Tsukasa giving up some of his own life energy. In the World of Amazon she starts to wonder if there is a point in there journey.

In the World of the Rider War, after being saved by Tsukasa, Daiki, Yuusuke, Wataru, and Asumu from Super Apollo Geist. Her nightmares become reality and the Rider War begins.

In Decade: Final Chapter Natsumi tries to convince the now Fury Form Decade to stop what he's doing but fails. She later becomes Kamen Rider Kivala to fight Decade and defeats him. Before disappearing Tsukasa gives her the Kamen Ride Cards he's received and the riders he defeated were revived.

After being told of Tsukasa's role, she seeks out a way to revive him and is successful by showing a picture of him to the A.R. Kamen Riders. Natsumi becomes Kivala again to stop Super Shocker with Tsukasa, Daiki, and Yuusuke and saves her grandfather after he reverts from Super Doctor Shinigami. She is last seen with her friends taking a picture after the conflict.

Kamen Rider Kivala
Natsumi uses a similar transformation method to Kamen Rider Kiva to transform into Kamen Rider Kivala. Kivala bites her hand making the Kivala Belt appear from red chains then places Kivala onto the buckle. Unlike Kiva she lack Fuestles but makes for this with the Kivalaa Sabre which she uses to perform her finishing attack, Sonic Stab.

Kivala Belt
The Kivala Belt is a transformation belt similar to the Kivat belt used by Kiva. Like Kiva after being bitten the belt appears from red chains then starts the transformation by placing Kivala onto the buckle.

Kivalaa Saber
A weapon used by Kivala which she uses to great effects. Unlike Kiva she does not require Fuestles to perform her finishing attack, Sonic Stab.