Andhelwn, the first ever equoid in the WindWalkers rpg continuum, in his unicorn form (he's actually a ceraptor or unipeg deity). In the story of the game, he created the equine race in his own image and Unicorns and Pegasi were his descendants out of mortal mares. There is a whole Trinity, Andhelwn the Creator, Mhyrrwn the Preserver and Daellwn the Destroyer, each the son of the one before and a mortal mare (Unicorn was the twin brother of Mhyrrwn and Pegasus was the twin brother of Daellwn). Andhelwn is white with flaming mane and tail, silver eyes, pearly white horn and a pure red Heartgem; Mhyrrwn is light, rain-cloud grey, with silvery moonlit mane and tail, blue-green eyes, platinum horn and silver-tipped wings, and an earthy brick red Heartgem; while Daellwn is darkest gunmetal grey, nearly black, with copper-tipped black mane, tail, horn and wings, burning red eyes and a blood red Heartgem.
Daellwn was not supposed to have any offspring, but he had an accidental child who was pretty much evil incarnate and looked something like a dragon, and a human girl, Daenwyn, who carried all the suffering of the mortal world in her soul and had a black-red Heartgem buried in her sternum. i wont go into how all that happened, lol.
When i took this photo it seems the colours didnt turn out exactly as they are on paper (of course) and the top and bottom seem to be cut a bit, but this is the only picture i have of this painting at the moment, and the actual thing itself is small anyway so dont expect anything much.