I definitely like this painting, since the story of Imrazor & Mithrellas is dear to my heart. Tolkien's tale of knightly romance and old-style faery contact played out well in the tale. I agree that Mithrellas was not necessarily a blonde, since most of the Elves native to Middle-Earth were dark-haired. (Light hair belonged to the Vanyar and the Noldor who were descended from Noldor-Vanyar unions.) The color of dress looked right for an elf of the Golden Wood. Being an elf she does not look especially distressed even after wandering about in the White Mountains and back-country of Gondor.
Gwindor looked shabby and worn when Beleg found him, but he had escaped from Angband. Voronwe looked bedraggled when he met Tuor, but he had been shipwrecked and washed ashore. Can't think of too many other Elves who looked dirty & disshevelled, even in the middle of the wilderness.
Wonderful work! I just wish it was a bit bigger...
I don't know much about this pairing, but the names are familiar. I guess I should look it up, since the unpopular pairings often are the best It always makes me happy to see any silvan elf portrayed, so thank you for sharing this!