Cian Tuatha Dé

Cian Tuatha Dé is the father of Lugh. He personally trained him and is touted to be the best assassin in his family's history.

Appearance
Cian is an adult man with short brown hair and a mustache.

Personality
He is usually seen as a cold-hearted assassin, but at the same time, he is a loving parent who cherishes his wife and family. He is considered the strongest assassin in Tuatha Dé's history, but when he saw Lugh Tuatha Dé’s potential, he realized his potential and trained him so that he could quickly surpass him.

He believes certain "infections" in the world can only be "cured" by assassinations and wants to make the world a better place. He didn't want his son to become an emotionless killer, which is why he taught him the value of human life. He was disappointed yet proud that someone like him would lose to his son when he was not even in his teens.

He has the greatest faith and assurance in his son that he would make the best decisions. He was objective and allowed Lugh to choose whether to quit being an assassin and live a humble life, which he had every right to. He also suggested for them to run away from the Royal family, which was essentially a death sentence when Lugh was being 'recognised' for his accomplishments. He knew that they were probably going to order him to do something ludicrous and tried to protect his son by making numerous unreasonable demands of the Kingdom beforehand, though it surprised him when they wholeheartedly accepted.

Background
When Lugh was born, Cian explains that he will bring him into the Tuatha Dé's clan as the world needs them. He promises Esri Tuatha Dé that he won't let him die.

Initially, he raises Lugh as a normal boy but still reveals their family secrets. Eventually, he starts training him as an assassin. However, he didn't want Lugh to be just a tool and had raised him to understand the human heart and make decisions for himself.

Lugh Tuatha Dé
A loving father, he is very proud of his son and the fact that he has absorbed so many of his teachings, especially on the occasion where his son broke his family creed to help his loved one, similar to how Cian himself had done the same to help his own significant other.

Trivia

 * His name is based on Cian - the physician of the Tuathe Dé (tribe of gods) - from Irish mythology.