Darkness is a character from the martial arts fantasy series Shadow Skill. He appears as a blind swordsman, but this physical limitation is deceptive, as his nature is far from ordinary human. He is described as seemingly not human, a being who possesses immortality and a range of mysterious, supernatural abilities that set him apart from the other warriors of the kingdom of Kuruda.

His personality is enigmatic and directly tied to his name and his otherworldly nature. He is an agent of fear, specifically embodying humanity's terror of death. His actions are not driven by personal ambition or malice in the conventional sense, but rather by a function that aligns with this chilling purpose. He is known to be a relation of the Holy Kingdom, suggesting he is connected to the larger, more mystical forces at play in the world of Ashliana, though his ultimate allegiance remains ambiguous.

Within the story, Darkness serves as a formidable and tragic obstacle. His most significant role is in the fate of Diaz Ragu, the older brother of the protagonist Elle Ragu. At the behest of the legendary warrior Scarface, who sought to teach Gau Ban a lesson about the reality of death, Darkness confronts and kills Diaz. This event is a pivotal moment in the series, as Diaz fights a desperate last stand against the immortal being to protect Gau and Elle. Diaz's heroic sacrifice, even in the face of an unbeatable enemy, earns him the highest posthumous honor and transforms him into an entity similar to Darkness himself. This act establishes Darkness as a catalyst for the development of other characters, forcing them to confront mortality and loss.

Darkness has key connections to several of the most powerful figures in the series. He is linked to Scarface, as it was the legendary warrior who seemingly orchestrated the confrontation between Darkness and Diaz for the sake of Gau's training. He is also associated with other top-tier fighters like the swordsman Kai Shink. His existence stands as a dark mirror to characters like Diaz, who also achieves a form of immortality after death, highlighting a central theme of transcending human limits.

Regarding development, Darkness remains a fairly static figure, functioning more as a force of nature than a character who undergoes a personal journey. His purpose is clear, and his actions are consistent with his immortal and fearful nature. His development is less about internal change and more about the revelation of his true nature and his place in the world's hierarchy of power, serving as a benchmark for the ultimate limits of mortality.

Notable abilities define Darkness and make him one of the most dangerous entities in the story. His immortality makes him nearly impossible to kill through conventional means. He possesses precognition, the ability to see into the future, as well as the power to see through emptiness or void, which renders many forms of attack or deception useless against him. He is described as having a form of immortality that allows him to survive fatal injuries and even protect the souls of others within his own body, as he did with Diaz after their fatal battle. These abilities, combined with his role as the embodiment of the fear of death, establish him not merely as a fighter, but as an existential threat within the world of Shadow Skill.