Ra's al Ghul

Ra's al Ghul (Arabic: رأس الغول‎ Raʾs al-Ġūl; "Demon's Head") is the leader of the League of Assassins. He is also the father of Nyssa al Ghul.

Early life
Ra's al Ghul at some point released Malcolm Merlyn from his bonds to the League, a decision he later regretted.

Season 2
Ra's sent a messenger to Sara Lance, ordering her return, though she refused and killed the messenger when he declined to report to Ra's that he had not found her, as she wanted. Around a week later, he sent Al-Owal and a team of assassins to bring Sara back by force, only to lose his team to both Sara and Oliver Queen.

Ra's was later contacted by Moira Queen after Malcolm mentioned that he went to Nanda Parbat. It was revealed that Ra's wanted to kill Malcolm for breaking the League's code of honor through The Undertaking.

Ra's sent Nyssa and a team of League members to once again try to bring Sara Lance back to Nanda Parbat, though Nyssa released Sara from the League.

Season 3
When Nyssa arrived back at Nanda Parbat, she confirmed Malcolm Merlyn was still alive. Ra's informed his daughter that Malcolm would face consequences but for his crimes against the leagues code. Ra's asked about Oliver to which he learned that he swore to protect Malcolm at any cost. Ra's then stated that Oliver courts war with the league.

Personality
Ra's has a cold demeanor. According to Malcolm Merlyn, Ra's is ruthless, as he will not hesitate to kill his enemies, though despite this he has a personal sense of honor. After Nyssa told Ra's that Sara was apparently killed by Malcolm, he paid no heed and only focused on punishing him for his role in the Undertaking, saying he never saw Sara as a true member of the League of Assassins, lending credibility to Malcolm's claim Ra's was the one who had Sara killed.

Abilities

 * Peak of human physical condition: As a highly skilled assassin, it can be assumed that Ra's is in top physical condition.
 * League of Assassins training: Ra's has gone through the training all League members do. He likely possesses skills with a variety of other melee weapons such as swords, that he keeps at his thigh.
 * Master hand-to-hand combatant/Martial artist: As the leader of the League of Assassins, it can be assumed that Ra's is a master hand-to-hand combatant and martial artist.
 * Master swordsman: As the leader of the League of Assassins, it can be assumed that Ra's is a master swordsman. In, he is seen wearing a sword.

Equipment

 * Sword: It can be assumed that Ra's can proficiently wield a sword. In, he is seen wearing a sword.

Trivia

 * Ra's al Ghul, along with his daughter, Nyssa, are normally portrayed as enemies of Batman and his associates. However, his organization, the League of Assassins, has a history with Green Arrow and Black Canary. In the DC comics Ra's' other daughter, Talia, generally has a higher profile, having been (briefly) married to Bruce Wayne and borne him a son, Damian.
 * It was revealed that Malcolm Merlyn was the only member Ra's ever allowed to leave the League, an act he seemingly regretted after Malcolm partially destroyed Starling City with a man-made earthquake.
 * In, Oliver reveals that he has heard of Ra's al Ghul and the League of Assassins, and knows of his reputation. How Oliver learned this is currently unknown.