(Based on my OC, Tuxedo)
Tuxedo is a mysterious dragon. Despite his dark nature, he always want the best for his friends, and is actually a benevolent and peaceful beign. He enjoys being classy and elegant, always wearing his bowtie. (unfortunately, FR doesn't have ties or bowties as apparel, and no, neck bows and waistcoats don't count) Some may call it vanity, but he will always take care to keep himself clean, and stay handsome.
He was basically a Shadow Dragon, but instead of fighting against the Light, he completed himself with it. Now, he controls both powers of Light and Dark, managing his sanctuary to keep the balance between the two forces. With such responsibility, his magical capabilities are outstanding.
He can also summon a magical liquid blue flame, which he like to use for multiple things, but he rarely uses it for battle.
He is also a liquid shapeshifter, having the ability to literally melt away into a black and white puddle, and then even disappear into nothingness, or take another creature's form. For some reason, he actually enjoys dissolving away, and in his free time, he often watches himself doing it.