Zenkaizer is the primary hero and leader of Kikai Sentai Zenkaiger. He is the transformed form of Kaito Goshikida, a cheerful and energetic young man who becomes the central fighter against the villainous forces threatening parallel worlds. As Zenkaizer, he wields the power of the Zenkaiju Gear and uses a versatile fighting style with a distinctive white-and-gold suit. He serves as the team’s main protagonist, inspiring allies and driving the story’s adventure across the multiverse.