Kengo Manaka is the main protagonist of Ultraman Trigger. He is a kind-hearted and determined young man who becomes the human host of Ultraman Trigger, the ancient Giant of Light. Working alongside the TPU, Kengo fights against monstrous threats and the darkness that returns to Earth. His role in the series is central, as he carries Trigger’s power, protects humanity, and uncovers the mystery of Trigger’s past while growing into a courageous hero.