Nagayoshi Mori is a vampire and the older brother of Ranmaru Mori. He was transformed into a vampire on the same day as his brother and has lived for over 450 years. Despite his youthful appearance, which includes a small stature and blond hair, Nagayoshi is an ancient and exceptionally powerful vampire. He possesses a ruthless and fierce personality, and his distinctive features include pointed ears, sharp teeth, and piercings. Known for a memorable fashion sense, he also holds a misplaced faith in vampire myths. In the story, Nagayoshi functions as both a formidable antagonist and a tragic figure, his motivations deeply tied to his complicated relationship with Ranmaru. His role in the narrative is that of a central antagonist whose actions stem from brotherly conflict. His abilities are those of a highly developed vampire, granting him superhuman strength, speed, and longevity that make him a dangerous opponent.