Kamen Rider Kaixa is a secondary Rider in Kamen Rider Faiz, most famously associated with Kusaka Masato. He is a sharp, ambitious, and often antagonistic character whose actions create tension among the main cast. Kaixa uses the Kaixa Gear to transform into a powerful armored Rider with a sleek gold-and-black design. In the story, he serves as both an ally and rival, complicating the conflict between humans and Orphnoch while driving key drama and betrayal within the series.