He would realize that magic doesn't have to be just about spells and potions. The spiritual energy and power - ups in Bleach fanfiction are different concepts. This could inspire him to think about magic as a more fluid and diverse force. He may even start to think about ways to incorporate some of the ideas he sees in the fanfiction into his own magical practices, if possible.
His view could become more broad. He'd see that magic can be manifested in ways other than what he's used to. For example, the zanpakuto in Bleach have unique powers that are different from any wand magic he knows.
His view of magic could expand. Anime often has very different interpretations of magic and superpowers. He might start to think more broadly about what magic can do and how it can be used.
His view could become more open - minded. He'd realize there are other ways to approach the supernatural world. For example, the way the hunters in Supernatural use weapons instead of wands might make him think about alternative forms of magic defense.
If Harry Potter reads wuxia fanfiction, his view of magic could be revolutionized. He is used to a system where magic is taught in a formal way at Hogwarts. However, wuxia presents magic as something that can be self - cultivated through discipline and training. He may start to think that there are other ways to develop his magic power, not just relying on textbooks and teachers. Also, the way wuxia characters use magic for justice and to protect the weak might make him reevaluate his own purpose in using magic. He may become more eager to use his magic for the greater good in a more hands - on and self - reliant way.
His view of magic might expand. In his world, magic is mainly about spells and potions. But after reading HTTYD fanfiction, he would see that magic can also be about the bond between humans and creatures like dragons. This could make him think more about the potential of magic in his own world beyond just what he has been taught at Hogwarts.
His view of magic might become more expansive. He'd see that magic can be used in ways he never imagined. For example, the way Fairy Tail mages use their magic for non - academic purposes like building things or creating shows. It could make him think about the practical applications of magic beyond just fighting dark wizards.
His perspective on power might change. In the Harry Potter world, magic is a natural part of life for him. But in RWBY fanfiction, power comes in different forms like semblances and the use of Dust. He would see that there are other ways to be strong and protect people that don't rely solely on spells.
He might be really confused at first. The worlds of 'Harry Potter' and 'Bleach' are so different. He'd encounter strange characters and powers that are completely foreign to his own magical world. Maybe he'd get some new ideas for spells or ways to fight dark forces from the unique concepts in the Bleach fanfiction.
His view might become more complex. He could start to see Boruto through the eyes of the fans, which may include some idealized or exaggerated versions.
Snape's view of Harry would likely become more complex. He might see Harry as more vulnerable than he previously thought. His initial disdain might turn into a sort of begrudging concern. He would realize that Harry is dealing with deeper issues than just being the 'Boy Who Lived'.
His magic could disrupt the balance of the Force. Maybe he could use magic to heal some of the wounded Jedi more quickly than they could with the Force.