Ultraman Trigger is the titular hero of Ultraman Trigger: New Generation Tiga. He is a giant light-based Ultraman who battles monstrous threats to protect Earth, especially against the darkness tied to the past of his ancient conflict. In the series, Trigger serves as the main protagonist and symbol of hope, carrying the legacy of a warrior who once fought in a distant age. He transforms through the power of light and different forms to confront powerful enemies and uncover the mysteries of his origin.