Well, the characters in Genshin Impact might be quite surprised at first. They come from different universes. For example, the art styles are different. Genshin Impact has a more fantastical, open - world kind of style, while Honkai Impact has its own unique and often more action - packed feel. If they were to react to the fanfiction, some might be amused, like Paimon. She would probably find the crossovers in the fanfiction really interesting and keep asking questions about the Honkai Impact characters. And Diluc might be a bit more reserved, but still intrigued to see how the two universes are combined in the fanfiction.
Some characters might be very intrigued. For example, Albedo, with his scientific mind, would likely analyze the concepts in the fanfiction related to Earth. He'd be interested in how Earth is depicted, its cultures, and technologies. He might even try to find similarities with Teyvat in terms of elemental powers or social structures.
Arlecchino's back story is rooted in the world of Commedia dell'Arte. He was one of the most popular characters. He was usually a servant in various scenarios. He had a reputation for being sly and quick - witted. He would get into all sorts of comical situations, whether it was stealing food from the kitchen without getting caught or playing pranks on his fellow servants or the nobles. His character was also associated with a certain amount of chaos and unpredictability, which made him a favorite among the audiences who loved to see what new antics he would get up to.
Shigaraki would likely be dismissive. He's so focused on his own goals of destroying the hero society that he'd see fanfiction as a useless distraction. However, if there were elements in the Genshin Impact fanfic that could somehow be related to his own plans, like powerful artifacts or magic that could be used for destruction, he might take a second look.
Some characters would be fascinated. For example, Fischl would likely see it as a grand adventure from another realm. She might even incorporate some of the elements from the Honkai Impact fanfiction into her own delusions. Keqing, on the other hand, would probably approach it more analytically. She would try to understand the logic behind the Honkai Impact world and how it differs from Genshin Impact. She might make notes about the different power - leveling systems and how the characters interact in the fanfiction.
The key elements include his status as a Commedia dell'Arte character. His being a servant means he has to deal with the power dynamics in the households he serves. Also, his mischievous nature is a big part of it. He constantly creates chaos and humor through his pranks and schemes.
Another interesting arlecchino fanfic idea is to place him in a different setting. Say, a modern - day city instead of his usual fictional world. See how he adapts to new technologies, cultures and social norms.
The students of Class 1 - A would have a range of reactions. Ochaco might find the romantic elements in the fanfiction really sweet, especially if there are any cute ship moments. Iida would likely be concerned about whether the fanfiction adheres to some sort of moral code. He might be nitpicky about things like fairness and justice within the fictional story.
One common theme is adventure. Since Aether is on a journey through Teyvat, fanfics often incorporate Arlecchino into his adventures. Another theme is mystery, as Arlecchino's character has an air of mystery about her. And of course, there's often a bit of romance or at least a strong connection between the two characters.