The concept often makes Harry more of a philosophical character. He starts to question the nature of life, death, and magic more deeply. For example, he might study ancient texts about death magic to understand his role better. He also becomes more empathetic towards those who have lost loved ones, as he has a closer connection to the afterlife. This can lead to him being more involved in helping others deal with grief and loss in the wizarding community. Additionally, his relationships with his friends may change as they sometimes struggle to understand his new powers and the responsibilities that come with being the master of death.
In some fanfictions, it makes Harry more confident. Since he knows he's the master of death, he feels a sense of purpose and power that he didn't have before. This newfound confidence allows him to take on Voldemort more fearlessly.
As the master of death, Harry can be portrayed as a more reclusive character in fanfiction. The knowledge and power associated with this destiny can isolate him from others. He may feel that he's on a different level than his peers, and this can cause some friction. On the other hand, it can also make him a more respected figure, with wizards and witches looking up to him for guidance regarding the mysteries of death and the afterlife. This new status can also attract enemies who fear his power and want to use it for their own dark purposes.
In some fanfics, like 'The Master of Death's Dominion', Harry uses his new status to become a benevolent dictator of sorts in the wizarding world, changing the political structure. In others such as 'Harry, the Reluctant Master of Death', he is hesitant to use his power and tries to hide it. And in 'Master of Death: A New Era', his being the Master of Death ushers in a new age of magic with different rules.
In some fanfictions, it changes by giving Harry more direct control over life and death. For example, he can revive the dead or prevent people from dying in a way that was not possible in the original books.
In crossover fanfics, the 'Harry Master of Death' concept often gets expanded. For example, in a crossover with the Star Wars universe, his mastery over death might be translated into an ability to resist the dark side's allure, which is related to death in a different way than in the Potter universe. He could use his power to save characters from the brink of death in a more 'Star Wars - y' way, like using the Force in conjunction with his magic.
It changes the power dynamics. In the original story, Harry is just a normal wizard with a special destiny. But when raised by Death, he may have access to powers beyond normal magic. He could be more in tune with the darker aspects of magic, like necromancy in a non - evil way. For example, he might be able to control or communicate with ghosts in a more profound way.
Immortality can turn Harry into a wiser character. He has the chance to study magic for centuries, and this makes him a master of many different forms of magic. His view of good and evil also changes as he realizes that things are not always as black and white as they seemed when he was young. He becomes more of a diplomat in the wizarding world, using his long - earned knowledge to prevent conflicts.
In fanfiction, when Harry is a 'feral child', it often makes him more independent. He doesn't rely on the normal support systems like other Hogwarts students. For example, he might not trust adults easily as he's had to fend for himself. This makes his relationships more complex, especially with Dumbledore who he may see as just another authority figure at first.
One interesting 'Harry Destined Master of Death' fanfiction could be where Harry fully embraces his role as the master of death early on and uses it to change the course of the wizarding war in unexpected ways. For example, he might be able to communicate with the dead more freely and gain valuable knowledge from them.
With Ginny, their relationship could be tested. Ginny might feel that Harry is becoming more distant as he delves into his new role. Harry, as the Master of Death, would have a different perspective on life and love. He might be more cautious about getting too close to Ginny, fearing for her safety. His friendships in general would be strained as he has to keep some secrets about his powers.
Well, in the original story, Harry was an orphan who had to figure out his place in the wizarding world on his own. But in 'Death Adopts Harry Potter' fanfictions, he has a very different kind of guidance. Death can offer him insights into magic that no one else could. For example, he might learn how to manipulate death - related magic, which could give him an edge against Voldemort. It completely changes the power dynamics.
It could be a matter of a character having a similar kind of power. Maybe they can control life and death in a way that's similar to how the Master of Death does in Harry Potter. They could use this to, say, revive fallen comrades in the Star Wars universe, just like Harry Potter might use his connection to the Deathly Hallows to bring someone back.