Presently, he is a very slender, black-scaled dragon-like creature. In some aspects, he looks perhaps a bit more like a snake than a dragon, precisely. His eyes are slitted, and a vibrant blue. He has sharp teeth that stick out under his upper lip, slits for nostrils, and bits of scraggly, oily-looking fur here and there, also black.
He is not inherently a black dragon, and rather his colouration is a state of being, not a solid trait. He is typically a vibrant, pale gold creature, adorned with beautiful feathers that fade from white to gold and bear intricate golden patterns on them, puffs of white cloud-like fur making him look airy and light. Most often, he also glows very brightly, and is quite difficult to look at directly.
In human form, Kassander is neither notably tall, nor terribly short; he stands perhaps a little bit taller than average, and holds himself with a sense of pride often well-reflected in the colder edge to his gaze. He has something of an otherworldly grace in the manner in which he moves, and it's quite clear, very early on, that he has a lot of control over his body. His hair is neatly trimmed, somewhat short, about to his ears in length at most, and a very bright, platinum-white-blond. He never has darker roots, because his hair grows that way, despite his eyebrows remaining dark.
Kassander is a bit androgynous, a bit too pretty to be really masculine, and if his hair was a bit longer, he'd be even more so. His build's more aligned for speed and manoeuvrability than strength, which serves him well. While he does have some vague musculature, most of it is in his legs. Despite his fair skin-tone, he does have a slight sun-kissed glow, a light dusting of freckles on the bridge of his nose, several birthmarks at his jaw, but his skin's undertones are pinkish.
None now remember where he came from, and most days, he doesn't remember, either. Perhaps it's for the best, in the long run. A long time ago, before the End, Kassander had been one of the lucky Others to find their Losrian. It likely wasn't too strange to find that when all was said and done, Kassander fell in love with him, and he fell in love with Kassander, but these things weren't meant to last in places like Tyrrhenia. It's so fitting, Kassander thinks, that Tyrrhenia is a land of nightmares, populated by dreams and could be and maybe.
He doesn't remember, now, the End and how it happened, only that it did. He remembers little snatches, shouting and people running around in a panic, and he remembers being calm through it all because somebody had to be. The sky went dark, and something metallic was ripped apart, or fell apart, or something, it seems important when he remembers it, but he doesn't remember it most of the time. And like all things do, his time with his Losrian ended, and Kassander was alone.
Unfortunately, Kassander is an Other that is also a god, and when a god-Other loses its magic, one of two things happen; either the god-Other also dies, or it goes insane. Kassander has always been too stubborn to just roll over and die, and clearly this instance wasn't going to be any different. He'd lost his light, but someday it'd come back to him, he just had to be patient.
He made it longer than most god-Others. He even created a daeni in his own image to run the Dragons of Circinus in his stead, because sooner or later, Kassander was going to become too dangerous to be around, and he knew that quite well, perhaps better than most. His brother, Icarus, stops by on occasion to check on the Dragons, and Kassander left them when the daeni leader was in one piece and functional, hoping to ride out the worst of it until he could find his Losrian again.
But Tyrrhenia is a land of nightmares and might've beens, and Kassander never did find him, not before it was too late for the god-Other. It took longer than it did for most, but steadily, Kassander lost his mind, and Suyis, the great bird Other of Pyxis, snatched Kassander up when he found him and hid him away in the basement of his tower. Kassander's been there ever since, and it's likely for the best. All he does is pace and snarl at things he doesn't recognise.
Art by atenebris.