Trigger Dark is the dark, corrupted form of Kengo Manaka’s ancient predecessor in Ultraman Trigger. In the series, he appears as a powerful and tragic counterpart to Ultraman Trigger, embodying the shadow of the hero’s past. Trigger Dark serves as an important part of the backstory, showing how the original light was tainted by darkness before later redemption. He is both an antagonist figure and a key symbolic element in the series’ themes of loss, power, and redemption.