Heather Blossom is a Shetlandian unicorn born to a Mirish family of farming earth ponies. (She was born after the Heather family migrated from Mireland to the Isle of Horse in search of arable land.) Being a unicorn, she was not able to farm like the rest of her family, so she had to find her niche elsewhere. She soon discovered painting, and she excelled at it. She was so good, in fact, that she became a veritable master within a few short years. This was due mainly to her incredible attention to detail, which supposedly allows her to also sense spirits and other paranormal phenomena.
Now, the Scelsh king Colin Guinness was a faithful patron of the arts, and he would regularly make tours of Fangland, Scales, Shetland, and Mireland to find new pieces for his massive collection. Upon discovering Heather Blossom's work, he was so enamored with it that he commissioned her to paint a royal family portrait, right on the spot! She agreed, and came with him to Castell Clogwyn (that is, Cliffside Castle) to begin her work. It was there that she met Prince Idris, who immediately fell in love with her tall, muscular physique, undersized horn, and standoffish demeanor--all of which actually garnered her plenty of teasing as a filly. With many songs, gifts, and other hopefully-charming things did Idris try to win her affection. In fact, her scarf bearing the national colors of Shetland was one of them. Unfortunately, she interpreted them as simply making fun of her. However, distrust turned to curiosity turned to endearment.
They were married about a year and a half later, and another year brought them their hippodrakos daughter, Firebrand.