Snape could be very cold at first, but then his natural instinct as a healer (since he is quite good at potions which are often used for healing) might take over. He might give Harry a potion to ease the pain and start to patch him up. All the while, he would probably be scolding Harry for being so reckless and getting into a situation where he got injured.
In this kind of fanfiction scenario, Snape might initially be conflicted. On one hand, he has his long - standing dislike for James Potter, Harry's father. But on the other, his sense of duty as a Hogwarts professor could kick in. He might reluctantly start to heal Harry, all the while muttering under his breath about how much trouble Harry always seems to get into, just like his father. Then, as he heals Harry, he might start to see some of Lily, Harry's mother, in him and soften a bit.
Harry could have a very interesting journey when he discovers anime fanfiction. Given his likely inquisitive nature, he would probably be fascinated by the various interpretations of anime characters in the fanfiction. He may start to compare and contrast the fan - created stories with the original anime plots. This could also lead him to engage with the anime fan community, sharing his thoughts and findings, and in the process, make new friends who share the same passion for anime fanfiction.
Snape could call Harry out and ask him what he's taking notes on. This would put Harry on the spot and create some tension in the classroom.
He would probably be amazed. Harry Potter comes from a world of wands and spells, but RWBY has a more modern - yet still fantastical - feel. The fanfiction might introduce him to new concepts like the Grimm, which are very different from the dark creatures he's used to. He could end up borrowing some ideas from RWBY to use in his own adventures, like the teamwork strategies the RWBY characters use.
The discovery of the Tensaiga in the fanfiction could also lead to some cultural clashes. Since the Tensaiga comes from a different fictional universe, Harry might struggle to understand its origin and purpose. He could seek help from Hermione, who would start researching about it. This could involve trips to the library, consulting with magical creatures, and in the end, they might find a way to incorporate the Tensaiga's power into their fight against the Death Eaters.
Well, if Harry Potter discovers chakra, he could potentially gain new magical abilities. He might be able to combine his existing wizardry with chakra - based powers. For example, he could use chakra to enhance his spell - casting speed or strength. Maybe he could even develop new spells that are a fusion of the two magic systems.
Well, if Harry Potter discovers the Tessaiga in fanfiction, he might first be really confused by this strange new weapon. He'd probably try to figure out how it works. Since he's used to his wand, the Tessaiga's different form of magic or power could be a real head - scratcher for him. Maybe he'd start using it in battles against Voldemort's forces, adding a whole new dimension to his combat abilities.
Snape might suspect that there is some dark magic at play. Given his knowledge and expertise in the Dark Arts, he would immediately look into any signs of foul play. He could also be conflicted because on one hand, Harry is a student he has had many issues with, but on the other hand, he is also an important figure in the fight against Voldemort. So he would have to decide whether to report Harry's disappearance or try to handle it privately.
Well, it could lead to a major turning point. Snape might be shocked and try to help Harry get the support he needs.
He could discover a hidden power within himself while lying there. Since he's always in the midst of action, this forced rest might give him time to tap into some latent magic ability he didn't know he had.