Oboro Isurugi is a central antagonist in the Taimanin Asagi series. She is a powerful and cunning ninja who serves as a major foe to the protagonist, Asagi Igawa. Driven by ambition and a thirst for revenge, Oboro orchestrates many of the events that challenge the Taimanin. Her manipulative nature and combat prowess make her one of the most dangerous enemies in the series, playing a pivotal role in shaping the story’s darker themes.