Ra's a Ghul is a immortal man born into the Arabian nomads. Ra's was interested in science from a very young age and eventually became a physician. In Ra's travel's he discovers the Lazarus pit which allows him to become immortal,  Ra's then created the secret organization called the League of Assassins. For over a millennium Ra's had trained the hidden group of assassins in the Tibetan mountains in a place called Nanda Parbat. Ra's and the League of Assassins have been silently manipulating history since their existence with the purpose of restoring balance to the world and to enact purges in certain world events. The League of Assassins exists in the modern day and is known for their wise yet mysterious and ancient manner.  

Ra's name translates into the demon's head. Ra's is an intelligent and wise man who knows multiple martial art techniques and is a religious zealot.

Ra's should sound divine and self righteous and should sound confident when he speaks. His voice can be any range of European or Asian accents, as he's lived in many places in Eurasia for over a millennium.