A dragonequus OC, because I have a hard time believing Discord is the only one of his species. And because I think there's the space for one more. Celestia, the Main 6, and Discord all seem to be geared more toward the outer/physical world. Luna and the CMC seem geared more toward the inner/personal (maybe spiritual?) world - with their aptitudes for dreams and Cutie Marks (purpose), respectively.
So where Discord causes chaos on a large scale - cotton candy clouds raining chocolate milk, turning the landscape plaid, and so forth - Tapsalteerie functions on a much more personal level. I'll go into that a bit more accompanying the picture of her as an adult.