Prim Posy

Prim Posy is a citizen of Ponyville, Equestria. A lover of flowers, Prim Posy is always seen wearing a flower in her coat.

Flower fad
Apparently, Prim Posy started the trend of Ponyville mares to wear flowers in their manes. She didn't mind it as she stated that "imitation is the sincerest form of flattery".