She would likely be filled with anger as well as sorrow. Twilight might start her own investigation to find out the cause of her brother's death if it was sudden or suspicious. She could also struggle with feelings of guilt, thinking that if she had been more powerful or present, she could have saved him. Her relationships with other ponies, like her friends, would also be affected as she might push them away in her grief.
Twilight would experience a deep sense of loss. She might have flashbacks to all the times she and Shining Armor had together, like when he helped her with her magic studies or when they played as foals. This could make her more empathetic towards other ponies who have lost loved ones. She may also hold a memorial service for him in Ponyville, inviting all those who knew and respected him, and use it as a way to start the healing process for herself and others.
Twilight would be devastated. She might go into a state of shock at first. Then she could become very withdrawn, shutting herself away in her library to grieve. Eventually, she would probably turn her grief into a determination to uphold her brother's values and use her magic to protect Equestria even more vigilantly.
Sure, there are many out there. Fanfics often take creative liberties. In some, they might be involved in solving a big mystery together in Canterlot. The relationship between them can be portrayed in various ways, from a strictly brother - sister type of protectiveness to a more unique and untraditional bond that still respects the essence of the My Little Pony universe.
Another option is to check out some My Little Pony - themed forums. Sometimes, fans share their own fanfics or recommend ones they've read. You might find some hidden gems about Twilight and Shining Armor there. However, make sure to follow the forum rules and regulations.
Perhaps in the fanfic, Shining Armor is poisoned by an unknown enemy within Canterlot. His slow death could be a time of mystery and investigation, as Twilight Sparkle and her friends try to find out who is behind it. His death might also lead to political unrest in Equestria as his role in the Royal Guard was crucial.
Often, these types of fanfics can be a great way to expand on the characters. They might show a different side of Shining Armor, perhaps a more vulnerable side when it comes to protecting his family. And Cadence could be shown as not just a princess of love, but also a strong leader. The fanfic could also explore their friendships with other ponies in Equestria.
The family - bond trope is quite common too. Stories might focus on their relationship as siblings, how they support each other through tough times. There are also some fanfictions that use the trope of Shining Armor teaching Twilight about leadership, since he has his own experience in that area. These tropes are popular because they build on the existing relationship between the two characters in the My Little Pony universe.
You can start by looking on fanfiction platforms like FanFiction.net or Archive of Our Own. These sites have a large collection of fanfictions related to Twilight Sparkle and Shining Armor. Just search for their names in the search bar, and you'll get a list of various stories.
Another common theme is magic and its role in their relationship. Given that they both have a connection to magic, fanfictions often explore how their magical abilities interact. Sometimes they use their combined magic to solve problems, or they learn new magical techniques from each other. This theme not only showcases their relationship but also adds an element of fantasy and wonder to the stories.
Another theme is loyalty. Shining Armor's loyalty to Twilight and vice versa. They are always there for each other no matter what. This can be seen in fanfictions where one of them gets into trouble and the other drops everything to help.
There's also 'Twilight's Protector'. In this fanfic, Shining Armor is portrayed as an even more over - protective brother. It has some really heart - warming scenes where he tries to keep Twilight out of trouble while she's on her adventures of learning magic. It's a really cute read.
A good fanfic about them should have a strong plot. It could be about them solving a mystery in Canterlot. Also, the characters need to be in - character. Shining Armor should be brave and loyal, and Cadence should be kind and full of love.