Characters can be developed based on their relationship with the knife and the microphone. If a character is more drawn to the knife, they could be shown as more of a fighter or a protector. If it's the microphone, they might be a storyteller or an advocate.
Well, one concept could be the juxtaposition of the dangerous or sharp nature of a knife with the communicative and often performative aspect of a microphone. Maybe it involves a character using the microphone as a weapon in a metaphorical sense, like using words as powerfully as a knife.
Generally speaking, ordinary earphones did not have a microphone. However, some headsets, such as wireless Bluetooth headsets, gaming headsets, or some headsets with remote control functions, might be equipped with a microphone. Therefore, whether or not there was a microphone depended on the type and design of the headset. While waiting for the anime, you can also click on the link below to read the classic original work of The King's Avatar!
In fanfiction, Percy and Hermione's characters can be developed in various ways. Some writers might explore Percy's sense of duty and how it interacts with Hermione's thirst for knowledge. For example, they could be on a mission together where Percy's strategic planning, which he learned from his time in the Ministry, combines with Hermione's research skills to solve a complex magical problem.
They are often developed by exploring new relationships. For example, the bond between Bella and her new vampire family members can be deepened or changed in fanfiction. Sometimes, characters are developed by giving them new powers or abilities that were not in the original story.
Character development can also involve giving backstories to minor characters. For instance, a random demigod in the fanfiction could have a tragic past that led them to the Labyrinth battles. This not only fleshes out that individual character but also adds depth to the overall story. And for the main characters, their flaws could be explored more. Percy's impulsiveness could lead to more serious consequences in some fanfictions, forcing him to learn and grow from those experiences.
One potential character could be Sasuke. He has always been highly skilled with weapons and his Sharingan would give him an edge in mastering knife techniques. He has the determination and the combat skills to be a great knife master in a fanfiction setting.
Obviously Naruto would be one of the main characters in most Naruto combat knife fanfiction. He could be the wielder of the combat knife, using it to fight his enemies.
They could become more sympathetic. For example, they might realize how small and fragile their world is compared to the large - scale war of the wizarding world. This could make them less cold towards Harry, as they see that he is part of something much bigger and dangerous.
For Naruto, you can focus on his growth in a different aspect. Since he already has his ninja skills, in a story with Aplessia, he could develop his emotional intelligence further. For example, learning how to better understand Aplessia's more complex and perhaps different emotional range compared to his friends in Konoha. For Aplessia, you can start by giving her a backstory. Maybe she has a troubled past that made her the way she is, and as she interacts with Naruto, she starts to open up and become more confident.
In fanfiction, Naruto could be developed by having him face new moral dilemmas when interacting with Yubel. His character could grow by learning about different forms of power that Yubel represents.