Cold-Hearted Assassin, great actor, and very good at "Cold Reads"
He harbors most of his emotions in an attempt to do as his master told him, "Shut them out. Emotions are like potato peels; worthless!"
To anyone willing to observe, they can notice how he holds himself with pride, but he's always on guard, ready for mental and physical attacks. He stands up quiet straight, his posture revealing that he is strong and agile. He knows that he's good, but he'd never brag or boast. He enjoys doing business with merchants and often thinks about becoming one himself. He enjoys killing much like normal people enjoy eating cake. It's a nice, sugary burst in his life that gives him a sort of high, but a let down later. His personality shines through everything he does, so just look out for it.
He carries a pack on his back that carries multiple daggers, throwing knives, swords, and throwing stars... But he only brings that when he absolutely needs them. Most of the time he wears black pants that conceal the daggers he has strapped to his thighs. He carries a blade on the bottom of his shoe, along with a throwing star on the other shoe. He's always prepared and ready for action.
His father left his mother and him when Leo was only three. Leo had to learn to help care for his mother, who was beginning to be consumed by her schizophrenia. She heard voices that urged her to burn things, kill animals, and yell at people--this put a great strain on Leo.
When she finally died when he was sixteen, he left his house; burned it, actually and went in search of work. He met a man by the name of Frediano. Frediano decided to teach Leo and guide him. By the age of 20, Leo knew two different forms of martial arts, could speak three languages besides German, fluently, and he also was trained in poisons, potions, and tonics. He learned how to throw daggers and stars and gut a deer in three minutes. He was growing stronger by the day.
At the age of twenty-one he took a vacation to a small fishing village on the coast of Italy. There, he met Isabella. They ran off together to Rome and stayed there, lovers. They drift in and out of the Vatican, mostly because many high-class clients and victims await beyond those walls! :)