The plot would change drastically. Without Harry, the hero, the fight against the dark forces would lack its central figure. The Order of the Phoenix might fall into disarray. Hermione and Ron would likely be the ones to try and fill the void, but it wouldn't be easy. There could be a search for a way to bring Harry back, which could involve dangerous and unknown magic.
If Harry gets the Dementor's kiss in fanfiction, it would likely be a very dark turn of events. His soul would be sucked out, leaving his body an empty shell. This could have a huge impact on the wizarding world. His friends, like Ron and Hermione, would be devastated. They would probably be on a mission to find a way to reverse it, if possible. It could also lead to chaos as Voldemort might take advantage of Harry's absence to gain more power.
He might become more refined in his manners. The Malfoys are a very proper pure - blood family, so Harry would likely be taught to act more like them. For example, he'd probably have better table manners and a more sophisticated way of speaking.
His story might change drastically. With a different wand, his magic could be more powerful or less controllable.
The story would change drastically. First, Harry's identity would shift from just a regular wizard to a werewolf - wizard hybrid. His daily life would be completely different. Instead of just worrying about Voldemort and schoolwork, he'd have to deal with the monthly transformation and the stigma that comes with being a werewolf. His relationship with Dumbledore might also change. Dumbledore would need to figure out how to handle this new situation, whether to keep it a secret or find a way to manage Harry's new condition in the open.
Harry would likely become more responsible and protective. He'd have to grow up quickly to face the situation. Lily, on the other hand, might become more assertive in her decisions regarding the pregnancy and their future.
In the books, the Dementor's Kiss is mostly shown as a final, soul - sucking end. But in fanfiction, characters might survive it with some strange changes. For example, they could become more withdrawn or have a new ability to sense Dementors.
If Naruto got Ice Release, it would change the plot in many ways. For one, his battle strategies would be different. Instead of relying solely on his shadow clones and Rasengan, he could freeze opponents in place with Ice Release. In team battles, he could create ice barriers to protect his teammates. Also, it might change his relationships. Some characters who were initially uninterested in him might see him in a new light due to this unique power.
Well, in certain fanfictions, the Dementor's Kiss is often explored in relation to a character's hidden past or secrets. Maybe a character who was supposed to receive the Kiss actually has a dark past that the Dementors are drawn to, but this also gives them a strange power to resist it. It can also be used as a way to explore the nature of the soul in the Harry Potter universe more deeply.
In this fanfiction, Harry's life would be transformed. With his mother's potions journal, he would have access to a wealth of knowledge that was previously unknown to him. He could experiment with new potions, which might attract the attention of other students and professors alike. This new - found knowledge could also put him in danger, as some potions might be very powerful and coveted by dark wizards. However, it would also give him a sense of purpose and connection to his mother, which could help him grow as a wizard and as a person.
Well, it changes it a great deal. The Dementors in the original story were more like mindless servants of the Ministry. But a Dementor Lord would be a thinking, plotting villain. It could strategize against Harry and the Order of the Phoenix, making it much harder for them to fight back.