As Twilight's evil actions become more pronounced, her friends would be deeply hurt. Rainbow Dash might feel a sense of betrayal, especially if Twilight starts to oppose the values of loyalty that they all uphold. They would probably try to reason with her, using their memories of the good times they had together.
At first, her friends would likely be in denial. They've known Twilight as a kind and good - hearted pony, so they might think there's some external factor causing her strange behavior. For example, Pinkie Pie might try to cheer her up with parties, thinking that would snap her out of it.
Her friends might become initially fearful. For example, Pinkie Pie might not be as bubbly around her, and Fluttershy could be too scared to approach her. They may start to distance themselves until they understand Twilight's reasons for using the dark magic.
Her curiosity might become even more intense. As a dragon, she has new abilities and a new form to explore, so she'll be eager to figure out all the ins and outs. For example, she'll be curious about how her dragon body works mechanically and magically.
The other ponies would likely be shocked. Pinkie Pie might initially try to cheer Twilight up, thinking she's just having a bad day, not realizing she's been turned evil. Rainbow Dash would probably be ready to fight Twilight if she poses a threat. Rarity would be horrified at the change in Twilight's appearance and behavior, as it goes against all the elegance and kindness she associates with her.
Her relationship with her friends would likely become strained. They would be shocked and scared of her new demon form. For instance, Fluttershy might be too afraid to approach her. Pinkie Pie's usual bubbly nature might be dampened as she tries to figure out how to deal with this new Twilight.
Brock would be shocked, but then he'd start observing Misty's new Vaporeon - like features. He might try to come up with some kind of potion or treatment to reverse the transformation. And he'd also be fascinated by how Misty's behavior has changed, like her new affinity for water.
An 'evil twilight sparkle fanfic' is simply a fan - made fictional story where Twilight Sparkle is portrayed as an evil character. Fanfic writers might do this to add a new and unexpected twist to the familiar My Little Pony story. It could be inspired by things like exploring what would happen if Twilight's thirst for knowledge turned into a more self - serving and malevolent pursuit, or if she was corrupted by some dark magic.
They often interact as teacher and student. Luna, with her vast knowledge of the old magic, can teach Twilight things that are not found in modern magic books. For example, Luna might show Twilight how to communicate with the spirits of the night.
Harry would probably be very concerned and protective. He's been through a lot himself, and he'd want to be there for Hermione. He might try to comfort her by just sitting with her quietly, sharing his own experiences of tough times to let her know she's not alone.
Harry might be a bit surprised at first. But then he'd understand that it's just another way Hermione is expressing herself. He'd probably be more interested in the meaning behind the tattoos.
First, you need to understand Twilight's character well. Know her strengths, her weaknesses, and what makes her tick. Then, think about what could realistically turn her evil. It could be a major betrayal or a dark magic influence. After that, create a plot that shows her descent into evil in a believable way.