Lugh Tuatha Dé

Lugh Tuatha Dé (ルーグ, Rūgu) is the former master and legendary assassin who was killed by his own organization and was reincarnated into House Tuatha Dé by Goddess to kill the hero and main protagonist of the series.

Appearance
He has spiky silver hair and silver eyes. He wears an assassin outfit that looks like normal aristocrat dress.

A crimson aura flows in his left eye whenever he is ready for battle or assassination.

Personality
As a master assassin from his previous world, he is ruthless in killing his targets. He has shown a calm and collected nature. He is also a kindhearted person as shown when he saves Tarte from dying in the cold.

He is a sharp person who can easily figure out people's true intentions, even if the other person is a supreme deity like the Goddess. He can also easily manipulate any person and gaining their trust. As being a wise but dangerous person, his motto is to avoid killing innocent people and to annihilates the entities who'll or might come in the way of his mission of killing the hero.

He is always shown to proactive and knows how to take the advantage of the situation, like when Headmaster gave Lugh and his group, a mission/order to befriends Hero and gain her trust.

He can be a little dense when it comes to women's feelings towards him, like of Maha and Tarte, mistaking their affection for admiration.

Background
In his previous life, Lugh was an elderly man known as the world's greatest assassin and was expecting to retire and become an instructor for new recruits after one last mission. On his way back, he realized that the assassin organization doesn't need him anymore and wanted to eliminate him by causing his plane to crash. That only saddened him as he was loyal and would have even taken his own life if they had told him he was no longer needed. As he died, he was transferred to a different realm where he met a Goddess who offered him to reincarnate with a new life or retain his memories and reincarnate in a different world, where he must kill the hero. Wanting to live for himself, the man agrees and chooses his own skills and gets reincarnated as Lugh Tuatha Dé, heir to a clan of assassins.

Skills
Lugh possesses all the five ranks of skills: S, A, B, C, and D, merely possessing an S-Rank skill is enough to put someone among the strongest people in the world that makes him the most powerful assassin in the world.

Master Assassination
As the best assassin in his previous life, his assassination skills surpassed his father's in the current life.

Rapid Recovery
S-Rank : 【Rapid Recovery】 Increases the recovery rate of the user's stamina, mana, healing, etc. The recovery rate is increased by a factor of 100. This multiplier can be increased with training.

Spell Weaver
A-Rank : 【Spell Weaver】 Allows the user to create new spells.

Limitless Growth
B-Rank : 【Limitless Growth】 Allows the user to break through their natural limitations.

Martial Arts
C-Rank : 【Martial Arts】 Grants excellent hand-to-hand combat capability and enhanced reflexes.

Unknown (D-rank)

Cooking
Lugh excels in cooking.

Normal

 * Earth
 * Wind
 * Fire
 * Water

Spell Weaver + Rapid Recovery
This magic is created by Lugh. This skill shines as it allows it’s user to train with inexhaustible stamina.

Gun Summoning
This magic can used by many but in case of Lugh, he can summon large number of guns at once with a massive firepower that is capable of destroying a mountain.

Gungnir
Lugh's strongest attack. First, Lugh summons a 100 kg heavy tungsten spear. Then, he casts on it an earth spell that alters the target's gravity to give it a negative value (multiplied by -2), making the spear accelerate upward at 19.8 m/s2. After 3 minutes (the spear now being 1,023.5 km aboveground), the gravity spell is cancelled, causing the spear to fall back on Earth at 4,480 m/s (nearly Mach 14) and generate a massive shockwave upon impact.

Mystic Eyes
A pair of eyes that Lugh acquired which allow long-distance vision. Objects in motion appear far clearer and even allows a stronger sense of depth. It also allows him to see mana. Normally, mana was something one could only sense, yet now he could faintly make out its flow within his body.

Dia Viekone
Lugh first met Dia as his teacher in the ability to use magic. She was impressed by his skills with magic. Learning that they can create new magic, she started to get interested in magic even more and all new magic creations deepened the bond between her and Lugh. During her short stay with Lugh, she would often feel lonely and come to Lugh's bed and use him as a body pillow to fall asleep. Being older than him, she liked to think of herself as Lugh's big sister, but instead she became like his little sister in all situations.

She is Lugh's main love interest throughout the series. Nonetheless, she is not too possessive of him and allows him to have a few mistresses, although she does not want other girls to make a move on him before she does, as shown when she finds out that Lugh had already kissed Tarte many times, even though it was for healing.

In volume 3 she had her first time with Lugh in a hotel in Milteu

Tarte
Lugh's assassination assistant, Tarte is a mage saved by Lugh who wholeheartedly entrusts herself to her savior. Even though she had gained Tuatha Dé's trust, Lugh had sworn to kill her if she turned out to be a spy or a traitor, but he sincerely believes in her. She hates anyone who speaks ill of Lugh and would not hesitate to kill such individuals. Lugh sees her as a potential partner who will never betrays his trust.

She is shown to have strong romantic feelings for him, and even dreams of Lugh doing perverted things to her, to which Lugh is fully oblivious.

Maha
Lugh's adopted sister, Maha is yet another mage saved by Lugh's machinations, although at that time, he was known by his alias, Illig Balor. She serves as the CEO of Lugh's cosmetics brand while Lugh is absent. She is also trained by him in assassination. She always helps him in every ways, even it is for an assassination.

Like other girls, she also has romantic feelings for him.

Trivia

 * Lugh’s name is inspired by the warrior king god Lugh Tuathe Dé/ Tuattha Dé Dannan in Irish Mythology.
 * He's especially skilled in the culinary arts.