Era Saga

Era Saga (サガ偉), the Flame-Wreathed Guardian (炎を払った保護者), is the main protagonist of Kamen Rider Nio. A descendent of Saga no Mamoru, it is his destiny to harness the power of Ari and defend humanity from the Enmi as Kamen Rider Nio (仮面ライダー仁王).

Friends

 * Shine Konno-
 * Goro Abe-

Branches and Ranks
Nio's various forms are divided Branches (支部) and Ranks (級). Due to his application of Moriteryū (守手流), he only possesses the Misshaku (密迹) and Naraen (那羅延) Branches, though as he absorbs the different layers of Ari's power he acquires newer Ranks, which grant him increased power and more varied abilities when using both Branches.

Devices

 * Toriiver - Transformation Belt
 * Omamari - Transformation trinkets