Leo is a moderately tall young man at just over 6 feet tall. He has chiseled good looks with high cheekbones, a cleft chin, and a bit of a brooding brow. His hair is dirty blonde and is usually unkempt, but in an intentional way that adds to his rakish good looks. He has soft blue-grey eyes and a ready smile. He is fit and athletic, and typically wears dark colors, enjoying the theater of having long coats, capes, and cloaks.
Leo is a carefree man with the soul of an adventurer. He is easygoing and generally kind. He's the type of man that everyone wants to know, who is as comfortable in a rowdy tavern party as he is in a more intimate setting amongst close friends. And what you see is what you get, he is the genuine article. Which isn't to say he won't lie, cheat, or steal to get what he wants, just not from those that don't deserve it, and not without some kind of reason.
His free-spirit-ness might be considered his biggest flaw, especially given that his father, the Duke of Silverus, would prefer he spend more time learning how to run a duchy and less time galavanting about on dangerous adventures. But Leo can't be contained, and rankles at even a hint of restriction.
Duke Jacob Sinclair - father.
From a young age Leo has been enraptured by tales of adventures and heroes and villains. When he was a teen he 'escaped' his father's palace and began to learn all that he could about adventuring, using a magical belt of disguise to let him blend in with the people of Silverus, dabbling in a number of professions and eventually going on his own adventures.
His nephelium blade, and his darkleaf armor.