Kamen Rider Elementia

Kamen Rider Elementia (仮面ライダーエレメンチア Kamen Raidā Erementia) is a Japanese tokusatsu drama in Azure Skylark's Kamen Rider Series. It is the first series in the Saisho period run and the first series overall. The series, whilst a crossover with Zero no Tsukaima is stated to potentially start in the near future, potentially running alongside a currently unknown Sentai season.

The tagline of the series is "Become the master of the infinite elements!" (無限の要素のマスターになる！ Mugen no yōso no masutā ni naru!) One of the underlying motifs of this season is elements and aspects.

Plot
Once upon a time, two different sets of worlds existed. Halkeginia, the land where magic was the key component of everything that existed, and Gaia, where technology reigned supreme and became the pioneer for human fluorishment. However, both world's perceptions on the stories outside their view will change when a lone human from Gaia is taken to Halkeginia, to become the familiar of a mage.

Who is he, and how much will he change everything?