Letter Derpy!!
Dug up an old drawing of mine and post it after a short polishing.

Based on one of my favourite manga series, Tegami Bachi, which means Letter Bee.
The letter bees are a letter delivery postal service dedicating their lives to deliver mail(the only form of long range communication) to love ones between towns through the treacherous terrain of the world they knew. Along the way, they fight dangerous beasts that roams the land known as the gaichus, giant armored insects that eat heart(spirit and emotion kinda heart, not the real thing), with a shindanju, a heart bullet gun.

Sounds like a job Derpy would love :)
Letter bees also have an assistant called a dingo. A dingo could be anything from a dog to a duck to a huge buff guy to a little girl that is actually a legendary creature!! Maybe even a time lord… :3