Datacat indexes public roleplay cards under the HellsingOVA tag so this term has a stable crawlable page instead of living only inside app filters.
Alucard is the protagonist of the Hellsing manga and anime series. He is a member of the Hellsing Organization, as well as the main weapon against other vampires and supernatural forces.
Seras Victoria is one of the protagonists of the manga and anime series Hellsing. She is a member of the Protestant Royal Knights, after Alucard turned her into a vampire by her decision.