He might be shocked and a bit disturbed. Percy is a heroic character, and seeing a 'dark' version of himself in fanfiction would be quite jarring. It's like looking into a distorted mirror of his identity.
Percy would probably be confused at first. He has his own self - image and set of values. Dark fanfiction might present him in ways that go against everything he stands for. He could also be a bit curious as to why someone would create such a version of him, but overall, it would be an uncomfortable experience for him.
Most Percy Jackson fans would likely be appalled. The original series is about adventure, friendship, and heroism among kids and young adults. A fanfic with such a inappropriate concept would go against what they love about the series.
He might find it really interesting. Since both Percy Jackson and Carter Kane are from different but equally rich myth - based series, he could gain new perspectives on how to blend modern settings with ancient myths, which is something his own series also does.
He might be amused. Percy has his own set of adventures, but reading about Magnus' would probably make him chuckle at the different takes on Norse mythology in the fanfiction.
Percy could find it both strange and fascinating. Since he has his own set of adventures and challenges, reading about Harry Potter's world through fanfiction might make him think about how different yet similar their situations are. He might be amused by some of the out - of - the - box ideas in the fanfiction.
They might be amused. After all, the fanfiction often portrays them in new and sometimes comical ways. They could find it interesting to see how modern humans imagine their lives and personalities.
He might be quite intrigued. Harry Potter is from a magical world himself, and seeing the different magical concepts and adventures in Percy Jackson fanfiction could be fascinating for him. He could compare and contrast the two magical universes, like how the magic is used, the different mythologies involved, and the types of challenges the characters face.
Well, Percy is used to strange things, but the multiverse would still throw him for a loop. In the fanfiction, he could start off being skeptical. After all, he's been through a lot in his own world, and the idea of countless other versions of his reality seems far - fetched at first. But as he delves deeper, he might start to see parallels between his world and the other universes in the multiverse, which could make him more accepting.
One interesting concept could be a darker version of Percy's powers. For example, instead of just controlling water, he might be able to use it in more menacing ways, like creating water blades that can cut through almost anything. Another concept could be a darker side to his relationships. Maybe his friendship with Grover takes a turn, and there's more conflict and distrust. Also, a darker Percy might have a different view on the gods, perhaps feeling more resentful towards them for all the hardships he has faced, instead of just being the hero who blindly follows their orders.
He might be quite intrigued. Harry is used to his own magical world, and reading about Percy's adventures would expose him to a different kind of magic system. He'd probably compare the demigod world to the wizarding world, like how they both have special powers but in different ways.
Most Percy fans would probably be outraged. Percy and Annabeth have a very special relationship in the original story, and fans are quite attached to it. This kind of fanfiction would seem like a betrayal of that relationship.