A bit more in-depth info along with some pose sketches.

Satire is very shadow-based, so his body is very flexible and deceptively strong even though it looks very frail. His mask is bonded to his face using Shadow energy, so it is impossible to remove by anyone other than himself, since it is pretty much just an extension of his body

True to his name, he has a dark sense of humor and is constantly playing "pranks" on his master, though he is usually the only one who enjoys these tricks.

He can alter his clothing(as well as his skin color, to a more limited degree) to whatever he likes, but he seems to favor dressing identically to Rasputin, just a lot more shadowy and wispy. He can meld into shadows, and often follows Rasputin by parking himself in his master's shadow, usually content to stay out of the way unless he is needed for something, which due to Rasputin's dislike for the demon, is a rare occurrence. The fact he can do what he likes with his master when they are at home keeps him patient and content to leave him alone when out and about.

Despite the cruelty he shows his bond-master, Satire is actually very protective of him, due to their soul-bond. He considers Rasputin his property, and will not tolerate any harm coming to him unless it is by his own claws. Even Belliath must be careful not to let her temper get the better of her when around her brother, because if she were to take it out on him, Satire would not hesitate to protect his "toy".