An albaric (donkey equiv. of pegasus, [see al'Buraq on Wikipedia](https://en.wikipedia.org/wiki/Buraq)) who thinks love letters are the most important mail in the world ([see belles-lettres on Wikipedia](https://en.wikipedia.org/wiki/Belles-lettres)). Whenever she's given priority mail she assumes it must be a love letter and delivers it posthaste and with great diligence.
Edited from >>2678830 which is FUNNY HA HA. 1. Sweetie BELLE became BELLE Lettre. 2. That's adult Sweetie Belle but slightly shortening the legs makes Belle Lettre look kinda like a filly which defeats the point of not using filly Sweetie Belle.
Like [Floral Folly](https://derpibooru.org/images/2965414), she's meant to be a shorty cute adult. Future characters will be more clearly adults (probably.)