Which of the main MLP:FiM characters would be most likely to kill somepony?

Spoiler: All of them.

Someone asked this question in "The Writers' Group," and I thought the question deserves a full answer.

Art credit: https://www.deviantart.com/mediumsizetex (cover image, cropped slightly, used with permission)

The Equestrian Postal Service used to be MUCH more dangerous.

"Now that we've invented paper," Princess Celestia tried to explain to her sister Luna, "we can send a message to another pony without the necessity to write the message on a THIRD pony, let alone ordering that third pony, upon pain of death, to seek out the recipient and display their flank."

_{(cover image source: I cropped and edited part of an official MLP comic to make a better cover image for this story.)}

One day, Twilight Sparkle wakes up to the realization that she's in a religious cult, and Princess Celestia doesn't really raise the sun.

Fiction about science counts as 'science fiction,' right?
Probably an entry in Science Fiction Writing Contest (Mk III).

Story's cover image source: I made and edited a show screencap.

Rainbow Dash finds herself working as a 'sensitivity reader,' and tries to prevent a series of literary murders.

_{(Cover image source: https://www.fimfiction.net/blog/953175/mockingbirb-made-a-cover-image-by-editing-one-or-multiple-screencaps-from-my-little-pony-and-or-related-videos-or-mlp-comics)}

"Really! This time she means it! 🤣"

Probably an entry in the Sunset X Villain “Tying the knot” competition (February 2nd 2024 to March 2nd 2024)

Cover image credit/source

It's scientifically proven that Sunday nights during a week when SOME PEOPLE are flooding the box with at least one Anon story every day are the worst time to submit a story to fimfic and try to get it featured, but...(shrug)...spontaneous fimfic-ing is fun!

In Equestria, some things are different.

Like where foals come from, and why some 'nature films' are horribly inappropriate for showing to general audiences.

_{Cover image courtesy of Françoise GARRANGER.}

_{stork movie, #stork}

When Twilight Sparkle returns from visiting the human world, she insists on wearing trousers. For some reason.

Spoiler: This is probably a shitfic.

_{Cover image credit: S. coaxed computer software to make this (probably Pony Diffusion.)}

Scootaloo visits Sunset Shimmer, and learns something horrifying about the differences between two worlds.

Written as an entry in the 2023 Cyberpunk Nightmare Night Story Contest, for reasons. ('some effects of computer technology on society')

This story also started as a draft for the Sunset X Villain AU contest, but...life and stuff kind of got in the way of making contest deadline. 'You know how it goes sometimes.'

Anon vanishes from his bed, replaced by an enormous ladybug.

Rarity and Spike investigate!

...

This story might or might not be an entry in RB_'s "Whodunnit? Youdunnit!" Contest.

Secret spoilered search keywords: Shadow Spade, Sherlock Pones, Detective Rarity, Rarity Investigates, Trixie Lulamoon, Lyra Heartstrings, Bonnie / Bon-Bon / Bon Bon / Special Agent Sweetie Drops, Starlight Glimmer, Madamoiselle Plumeau Précipité, night train, overnight train, sleeper car, Trottawa, Grand Vienneighse Hotel, Haybec, Haypril, anti-teleportation runes, giant cockroach, David Wyllie, Franz Kafka's "The Metamorphosis", foot pics, hoof pics, feet pics, Trixie is bad at magic, please ignore the teacups.