One frequent theme is the idea of identity. Harry, with his own identity as a wizard and the Boy Who Lived, has to grapple with Alucard's identity as a powerful vampire. Also, the theme of friendship or rivalry might be present. They could start as rivals due to their different natures but end up as friends who respect each other's abilities.
A common theme is the clash and eventual harmony of different power systems. Harry has his wizard magic from the Potterverse, and Alucard has his vampiric abilities. Their coming together often involves exploring how these powers interact. Another theme is the idea of redemption or transformation. Alucard, being a vampire, might be seen as a dark character, and through his relationship with Harry, he could experience a change.
Common themes often include the struggle between light and dark. Harry is typically associated with the light side in the Potterverse, while Alucard has a more ambiguous moral standing. There could also be themes of redemption as they influence each other. For example, Alucard might be influenced by Harry's sense of justice and Harry might come to understand the more complex nature of good and evil through Alucard. Additionally, friendship or a deeper relationship might be a theme as they learn to trust and rely on each other in the fan - created scenarios.
One common theme is power. Alucard is a very powerful character, so fanfictions often explore how he uses his power, how he gains more power, or how he struggles with the consequences of his power. Another theme is redemption. Given his often dark and violent past, many stories deal with Alucard seeking some form of redemption.
One common theme is the exploration of her power in a different gender context. For example, how she might use her vampiric abilities differently as a female. Another theme could be relationships, like romantic relationships with other characters in the Hellsing universe, which might be portrayed differently compared to when Alucard is male.
One common theme is the exploration of their different natures. Since Bella is often portrayed as a more innocent or human - like character, and Alucard is a powerful vampire, there's a contrast. Another theme could be power dynamics, like how Bella might be influenced by Alucard's power or how she might change in his presence.
Power struggles are a common theme. Since Alucard is very powerful, when he crosses over into other universes, there are often clashes with powerful characters there. Another theme is the exploration of his identity. In different crossovers, his vampire nature and his moral compass are re - examined.
One frequent theme is the struggle against prejudice. In many fanfics, their relationship might be frowned upon by others in their respective worlds. So they have to fight for their right to be together. There may also be themes of self - discovery as they learn more about themselves through their relationship. For instance, Harry might discover new aspects of his magic when paired with Alucard, and Alucard might learn more about his humanity or lack thereof.
A common theme is the battle of ideologies. Anderson, being a devout Catholic and Alucard, a vampire, they have very different outlooks on life and death. Fanfictions often explore how these clashing beliefs interact when they face each other.
A prevalent theme in 'alucard x oc fanfiction' is the struggle between good and evil within Alucard. The OC usually plays a role in this internal battle. Additionally, themes of loyalty and betrayal can be found. The OC may have to prove their loyalty to Alucard, and there could be elements of betrayal from other characters in the story. Also, the exploration of immortality is common, as Alucard is immortal and the OC might be mortal, leading to complex emotional and plot developments.
One common theme is the supernatural. Since Alucard is a supernatural being, the fanfictions often involve elements like vampires, magic, and the occult. For example, the reader might be a human who gets involved in Alucard's world of the supernatural.