Most likely Sonic's friends like Tails and Knuckles would be involved. Tails could be the one coming up with new technological enhancements for Sonic's makeover, while Knuckles might offer some advice on how to make Sonic look more tough.
Well, in the 'sonic gets a makeover fanfiction', Sonic could be given a makeover by his friends. They might change his color scheme a bit, like adding some blue highlights to his fur. His speed could also be enhanced in a new and exciting way as part of the makeover. Maybe he gets some new power - up items that are integrated into his new look.
Sakura could be one of the main people to give Naruto a makeover. She has always been concerned about appearances to some extent and might see Naruto's scruffy look as something that needs changing. She could use her medical ninjutsu skills to give him a more refined face structure, like getting rid of some of his minor scars, and then style his hair in a more modern way.
Obviously Hermione herself is the central character. But her friends like Harry and Ron would surely be involved. They might be shocked or supportive of her new look. Also, characters like Draco Malfoy could be involved. He might react with jealousy or new - found interest depending on how Hermione's makeover changes her overall presence.
The plot could revolve around Naruto being entered into a ninja beauty contest by Sakura as a joke. But Naruto, being Naruto, decides to take it seriously. So, he gets a total makeover. He starts training not just in combat but also in poise and grace. His makeover includes learning how to groom his hair better, wearing more refined ninja clothing, and even learning some basic etiquette. Along the way, he discovers a new side of himself and also manages to change some people's perception of him in the ninja world.
In this kind of fanfiction, Hermione might get a new look that completely changes how others perceive her. For example, she could change her hair style from the bushy curls to sleek straight hair. This new appearance might attract the attention of characters who previously didn't notice her in that way.
I'm not sure specifically as there could be various interpretations in such a fanfiction. Maybe Metal Sonic sets Sonic up in a way that makes Sonic look bad to the other characters, perhaps by faking some evidence or causing chaos and making it seem like Sonic's fault.
The bullied girl might start to gain confidence after the makeover. For example, she could finally stand up to her bullies. Maybe she catches the eye of someone special who used to overlook her before the makeover.
Well, it could be about Hermione deciding to change her look completely for a fresh start in the summer. Maybe she gets a new haircut, like a stylish bob, and starts wearing different types of clothes, more modern and fashionable. She might also experiment with makeup, going for a more natural look during the day and a bolder one for evenings out.
In a fanfiction, the makeover could be part of a spell gone wrong. A new spell created by Hermione accidentally affects Snape instead of its intended target. His appearance changes completely. His greasy hair becomes shiny and smooth, his sallow skin turns a healthy complexion, and his robes transform into a sleek, well - fitted set. This new look makes the other teachers see him in a different light, and they start to include him more in social events at Hogwarts, much to Snape's initial discomfort but eventual enjoyment.