Crimson Abyss: The Dark Godfather's Contract Bride

Top bounty hunter Katerina seeks revenge for her mentor's murder, entering a vampire-werewolf underworld. Near death, vampire godfather Valerius saves her and forces a blood bond. They unite against enemies, uncover conspiracies, and awaken her Saintess power. They defeat the vampire elder, escape overseas, but the ancient Vampire Progenitor awakens.