Shandar

Shandar is a unicorn that was first summoned by Albar while demonstrating the finer points of spellcasting to Viridian. When they tried to unsummon him, he turned into a beam of light and escaped from the White Tower, much to their confusion.

Shandar has the ability to phase between solid and light, and that gives him enough of an energy boost to be able to fly. He is also able to use Olde Magic to communicate with Vee in a gentle whisper, and as their friendship grew from strength to strength, so did his vocabulary and ability to reason. These abilities place him considerably a few notches above a typical unicorn, and it is unknown how he gained them.

There is also a suspicion that Shandar serves as a sort of catalyst for Vee to perform enhanced magic, but the truth would only be discovered at the end of the trilogy. Shandar was regarded as a hero after the Battle of Halibar, and as such was given his own room at the palace of Halibar.