There's a fanfic called 'Twilight's Tears of Loneliness'. It shows Twilight in a state of distress after she fails an important magic test. She cries because she feels like she has let down her mentor, Princess Celestia. The author does a great job of delving into Twilight's insecurities and how the crying is a release of all those pent - up emotions.
A likely candidate could be Discord. He is known for causing chaos and mischief. He might pretend to befriend Twilight Sparkle only to betray her at a crucial moment. Another possibility is Trixie. Trixie has been jealous of Twilight in the past and could betray her out of envy.
Flash Sentry could be a likely groom. He has shown an interest in Twilight in the past and they have had some interactions that could lead to a romantic relationship. Another option could be a completely new character, perhaps a powerful wizard or a prince from a far - off land who Twilight meets during one of her adventures and falls in love with.
It could be a pony who is extremely extroverted if Twilight is introverted. Someone who loves chaos and spontaneity instead of Twilight's love for order and planning.
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.
Fanfiction about Twilight Sparkle being banished can also be a vehicle for exploring different relationships. Maybe she meets characters she would never have interacted with in the show. Her banishment could bring out different sides of her personality. She might become more resourceful or develop a stronger sense of self - reliance as she tries to navigate her new situation.
One great 'Twilight Sparkle Fanfiction' is 'A Magical Friendship'. It really delves into Twilight's growth in magic while also strengthening her bonds with her friends. The story has a lot of interesting plot twists and the characterizations are on point.
I'm not sure specifically what Twilight Sparkle is reading in the story. It could be a magical spell book, a historical account of Equestria, or a fable about friendship.
The appropriateness of a 'twilight sparkle diaper fanfic' is highly subjective. Some people might find it completely inappropriate due to the rather strange and unorthodox combination of the character and the diaper concept. Others, if the story is written in a very innocent, perhaps even child - like way, might see it as just a creative and quirky piece of fanfiction. But overall, it's not a type of fanfic that would be considered appropriate for a wide - ranging and diverse audience.
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.