Overall, Hellsing Ultimate is reasonably close to the manga. Some minor details might be different, but the main story and the core characters remain consistent. The animation style also does justice to the manga's dark and intense atmosphere.
One common theme is the exploration of Anderson's past. Many fanfics try to dig deeper into his backstory, like his upbringing and how he became a member of the Iscariot Organization.
In Hellsing Ultimate Abridged Fanfiction, it's a fan - created work that builds on the Hellsing Ultimate world. It could involve the same characters like Alucard, Seras Victoria, and Integra Hellsing. The abridged aspect means it may cut out some parts of the original story and add its own twists. Maybe it gives a different perspective on the battles between the vampires and the Hellsing organization. It could also introduce new dialogues that are full of inside jokes and references that fans of the original would appreciate.
Another option is to check out some Hellsing - related forums or communities. Fans there might share their own written Anderson fanfics or recommend some great ones that they've come across.
You could also focus on an alternate universe where the events of Hellsing Ultimate took a different turn. Maybe Integra made different decisions early on, which led to a completely different power structure within the organization and different battles against the forces of evil.
A common theme is the clash of cultures. Naruto's world is full of ninja clans and honor, while Hellsing has a very different set of values centered around vampires and the fight against the undead. So, the fanfics often explore how these two different cultures interact.
In Hellsing Ultimate fanfiction, the interaction between Alucard and Seras holds great significance. Alucard, being a very powerful and experienced vampire, has a lot to teach Seras. His interaction with her can be a source of her growth and transformation. For example, he might teach her how to better use her vampiric abilities or how to face different enemies. On the other hand, Seras' presence also has an impact on Alucard. She represents a new beginning or a different path for vampires. Her more human - like qualities can sometimes make Alucard reflect on his own existence. Their interactions can also create interesting storylines, such as when they face a common enemy together or when there are internal conflicts within their relationship.