In my mind, unicorns are small and goat-like, like my unicorn in my 'Cloud Unicorn' painting. Then there are half unicorns, which are more like the white-horse-with-a-horn creature. Only in world, the half unicorns don't have horns. They do have the special ability to be able to travel between the mortal realm and the plane of the unicorns. In my novel, Lord Nicasio and his people take advantage of this ability in order to travel quickly between places.
I decided that I didn't want all my half unicorns to be the same, so I'll be making little portraits of each of them. I'm not sure which one this is: Vonni (Malraune's mount) or Nebi (Gautier's mount). He isn't really pink and blue, but I'm trying to express what it's like when the half unicorn slips into the plane of the unicorns. He sort of turns crystalline... or melds into the clouds... it's something the mind can't quite perceive. Watercolor.