Kazuki Komon is the main protagonist of the series 'Ultraman Nexus,' a part of the larger Ultraman franchise. He is a compassionate and determined member of the Night Raiders, an organization that battles mysterious monsters called Space Beasts. Kazuki serves as the human host for Ultraman Nexus, allowing him to transform and fight against these threats. Throughout the series, Kazuki struggles with his own doubts and trauma, but ultimately grows into a heroic figure, embodying hope and resilience.