OVA
Description
**Kuki Kosaburo** is a former KGB operative who forged a new path as a freelance mercenary. His history encompasses violent communist activities, including membership in a terrorist cell responsible for crashing a drone aircraft into Tokyo's financial district to destabilize capitalist systems. This past directly links him to individuals explicitly identified as violent terrorists and criminals, resulting in numerous innocent deaths attributable to his actions.

Operating in France, he is ensnared in a conspiracy when framed for the brutal murder of Marie-Anne, one of his regular prostitute clients. This setup compels him into an uneasy collaboration with George Lasaar of the French intelligence service (W.I.N.G.), who employs electric shock torture to coerce him into investigating the CIA's "Dracula" project. Adopting the codename "Bat" for this mission, he relishes the moniker.

Despite a morally ambiguous past steeped in violence, he adheres to a personal code. He demonstrates fervent loyalty and protective instincts toward allies, particularly his friend Muraki—a fellow former terrorist—and the Parisian prostitutes he frequents, whom he treats with unexpected generosity by providing them money without transactional expectations. His outrage at Lasaar's exploitation of Marianne's murder as leverage underscores this conflicted morality.

Throughout the mission, he showcases exceptional combat proficiency, surviving severe injuries and engaging in intense gunfights. His investigation centers on Lamia Vindaw, a film star targeted by vampire terrorists and the CIA due to her unique DNA. Initially motivated purely by financial gain, his focus shifts decisively toward protecting Lamia upon learning the broader context: the vampires are aliens seeking to revive their leader to prevent an invasion by a rival species. This revelation forces him to reassess his alliances, leading him to oppose the CIA and aid the vampires.

His trajectory involves a transition from self-serving mercenary to protective figure, though this shift occurs abruptly. By the climax, he prioritizes Lamia's safety, confronting CIA operatives and rescuing her during a violent showdown. His relationship with Lamia concludes ambiguously, with their reunion implying unresolved future challenges tied to the looming alien threat.

Key traits include formidable physical resilience, tactical ingenuity, and a defiant demeanor—exemplified by his vulgar retort when restrained in a straight jacket and his ruthless interrogation methods. His dialogue consistently reflects a blunt, cynical worldview shaped by his background in espionage and terrorism.