Dark Ninja is a primary antagonist in the anime series 'Ninja Slayer'. He is a powerful and enigmatic ninja known for his ruthlessness and exceptional combat skills. As a key member of the Soukai Syndicate, Dark Ninja plays a crucial role in the ongoing conflict with the protagonist, Ninja Slayer. His dark past and mysterious motives add depth to his character, making him a formidable and unpredictable adversary. Despite his villainous nature, Dark Ninja is driven by a complex code of honor and loyalty, which occasionally brings unexpected twists to the storyline.