The relationship between them in fanfiction also affects their portrayals. If the fanfiction focuses on a timeline where Dumbledore and Voldemort were once friends or colleagues, their characters will be different from a story where they were always bitter enemies. Dumbledore might show more regret or a sense of failure if he couldn't prevent Voldemort from turning evil in such a scenario, and Voldemort might have a different level of respect or hatred for Dumbledore depending on their past interactions.
In the Harry Potter series, Dumbledore and Voldemort were two key characters, and they were closely related to Harry Potter. Dumbledore was the headmaster of Hogwarts School of Witchcraft and Wizardry. He was a very intelligent, powerful, and righteous wizard. He played the role of a mentor and guide in the growth of Harry Potter. Dumbledore knew that Harry's fate was closely linked to Voldemort. He gave Harry help, advice, and magical knowledge at many critical moments, guiding Harry on the path to fight against Voldemort. For example, he told Harry many important things about the Deathly Hallows and encouraged Harry to develop his courage, wisdom, and friendship so that he could take on the burden of fighting Voldemort. Voldemort was the villain of the entire series. He was a powerful Dark Sorcerer who pursued power, immortality, and absolute rule over the Sorcerer World. Voldemort had hunted Harry down when he was still a baby because of a prophecy that he would be his nemesis. He killed Harry's parents, but when he tried to kill Harry, his Killing Curse was reflected by Harry's mother's Sacrifice Magic, leaving a lightning-shaped scar on Harry's forehead and miraculously surviving. Voldemort's reign of terror and evil behavior plunged the wizarding world into darkness and fear. He constantly created various plots and killings in an attempt to break the peace of the wizarding world. As Harry Potter grew up, he gradually realized that he had to fight against Voldemort to protect his friends, family, and the entire wizarding world. As the protagonist of the story, under Dumbledore's guidance, Harry Potter continued to grow and accumulate strength. With his courage, wisdom, friendship, and belief in justice, he finally defeated Voldemort and brought a new era of peace and tranquility to the magical world. Harry Potter and the Sorcerer's Stone was not enough. Everyone, please click to read the novel!
Some fanfictions might explore a more nuanced past relationship between them. Maybe they had interactions in their younger days that shaped their future enmity. Dumbledore, with his deep understanding of magic and people, could have recognized the darkness growing in Voldemort early on and tried to guide him away from it, but Voldemort's pride and thirst for power made him reject any such guidance.
In fanfiction, Dumbledore could have set up a series of trials or quests for Harry before the final battle. These experiences make Harry stronger both magically and mentally. Dumbledore might also have a secret plan that he has been preparing for years. He could be using his own powerful magic in a covert way to weaken Voldemort over time, like gradually breaking down the protection spells around Voldemort's Horcruxes so that Harry can find and destroy them more easily.
Often in fanfiction, Dumbledore helps Harry understand the nature of Voldemort's soul - splitting into Horcruxes. He may guide Harry in the search for these Horcruxes. Dumbledore could also use his own powerful magic to shield Harry from Voldemort's attacks, at least until Harry is fully prepared for the final confrontation.
Often, Dumbledore as Death would be a very complex character. He may not be the straightforward evil or good. His role might be more about maintaining a balance in the wizarding world, which is similar to the concept of Death in some mythologies. He could be using his influence on the different characters in different ways. For instance, his relationship with Snape could be a part of his plan as Death. Snape's actions, which were so crucial in the original story, might be reimagined as being directly or indirectly guided by Dumbledore - as - Death. This could add a whole new layer of mystery and intrigue to the fanfiction.
In some fanfiction, inquistors are shown as more corrupt than in the original books. They might take bribes or abuse their power for personal gain. For instance, an inquistor could let a known dark wizard go free in exchange for a valuable magical artifact.
She is often portrayed as a tragic figure. Writers usually emphasize her delicate state, both physically and mentally. Her magic is also a key aspect in many portrayals, with it being either a source of her pain or a hidden power waiting to be unleashed.
The Death Eaters would also have different character development. They might initially be suspicious of Harry, but as he proves his loyalty to Voldemort, they could start to accept him. Some might even see him as a potential leader in the future. Harry's development might also include changes in his magical abilities. Since he's learning from Voldemort, he could gain new and dark forms of magic. This would change his perception of himself and how others see him. His appearance might even change, becoming more gaunt or having a darker aura, which is a physical manifestation of his internal change.
Perhaps Dumbledore is being forced in this fanfiction. There could be some dark magic or powerful dark wizard threatening Hogwarts or the wizarding world. Dumbledore, in a desperate attempt to save everyone else, gives Harry to Voldemort as a sacrifice. But Harry, being the hero he is, could find a way to turn the situation around and defeat Voldemort from within his lair.
Hermione would be horrified. She would immediately start trying to figure out a way to rescue Harry. She might start researching in the library for some ancient spells or forgotten magic that could help. Ron would be angry at Dumbledore and would probably want to rush off to save Harry without much of a plan at first.