Guren Ichinose is a complex and enigmatic figure. He is a high-ranking officer within the Moon Demon Company, known for his strategic brilliance and strong leadership. Guren is fiercely determined to protect humanity from vampires, driven by a personal vendetta against them. He possesses a stoic demeanor, often masking his emotions, and harbors dark secrets related to his past and the demonic powers he wields. Guren is a central character in the series, embodying both heroism and inner turmoil.