In his daily life at Hogwarts, the German Shepherd could become Harry's study partner in a way. Harry could talk to the dog about his problems with schoolwork or his concerns about Voldemort. The dog's presence could also attract the attention of other students, some of whom might be interested in befriending Harry just because of the cool dog. This could change Harry's social life at Hogwarts as he gets to interact with different students who are drawn to the dog. Additionally, the dog could help Harry in his Quidditch practice by retrieving the Quidditch balls when they fall far away.
Well, it would change a great deal. For one, he might get better grades in Potions as Snape would be more likely to give him extra help. Also, he might be more protected from the likes of Draco Malfoy and his gang, since Snape would not tolerate any bullying towards his adopted son. Harry could also have access to Snape's private library, which would expand his knowledge of magic far beyond what he could learn in the regular Hogwarts curriculum.
In this fanfiction, Harry's life at Hogwarts would be full of new discoveries. He could find secret passages that are overgrown with plants but are only visible to him because of his connection to Demeter. His friends might be a bit in awe of his new powers. He'd also have to deal with some jealousy from other students who don't have such unique abilities. And when it comes to Quidditch, he could use his nature powers to his advantage, like creating a gentle breeze to help him fly faster or making the grass on the pitch grow in a way that confounds his opponents.
She could make him more aware of the Muggle world. Harry has grown up mostly in the wizarding world, and having a Muggle girlfriend would expose him to different ways of thinking, like Muggle technology and their social customs.
Harry could change Hogwarts in fanfiction through his leadership. He might inspire the students to be more united and inclusive. For instance, he could start a club or organization that focuses on helping students from different houses interact better, breaking down the traditional rivalries between Gryffindor, Slytherin, Hufflepuff, and Ravenclaw.
Harry's relationships might change a great deal. Some of his Hogwarts friends might support his decision, while others could be disappointed or even cut ties with him. On the other hand, he could form new alliances with outcasts or those who oppose the traditional Hogwarts system. He might also face more challenges as he no longer has the protection of Hogwarts. He has to be more careful about dark wizards who might target him more easily now that he's on his own.
In fanfiction, Harry Potter can change Hogwarts in a multitude of ways. His unique position as the Boy Who Lived gives him a certain influence. He may use his fame and power to bring about changes in the curriculum. For example, he could push for more practical defense against the dark arts training, considering his own battles. His relationships, like his close bond with Hermione and Ron, could also lead to changes. They might start study groups or clubs that become popular at Hogwarts, changing the extracurricular landscape. Moreover, his encounters with different magical creatures could result in new courses or research areas at Hogwarts. All these elements contribute to the transformation of Hogwarts in fanfiction.
In terms of his classes, Defense Against the Dark Arts would be a whole new experience. He could use his Saiyan powers to counter dark magic in ways that no one has ever seen before. He might even develop his own unique spells that are a blend of magic and Saiyan energy, making him a truly formidable wizard - Saiyan hybrid at Hogwarts.
The discovery of the abuse might make Harry more empathetic towards other students who have had difficult pasts at Hogwarts. He could become a sort of advocate for those who are bullied or mistreated. Also, it could affect his relationship with his teachers. Some teachers, when they learn of his past abuse, might be more lenient or offer more support, which in turn helps him grow and develop at Hogwarts.
Well, it would definitely make it harder for him to see clearly in classes. He might struggle to read the blackboard or follow along in his textbooks, which could affect his grades.
However, it could also cause some division. There might be some students or staff who think that revenge is not the proper way, even against someone as cruel as Umbridge. This could lead to arguments and a split in the Hogwarts community, at least for a while.