Lugh

Lugh is a thief who possesses three legendary treasures, as well as a member of Iscariot opposing the Magic King. Initially appearing during Iscariot's assault on the Royal Bilbia Academy, Lugh has since become both an enemy and occasional ally to Arata and the Trinity Seven. She often greets Levi by crossing blades with her, which has happened on at least 3 separate occasions.

Personality
Lugh is a very candid and nonchalant young woman who often appears emotionless, although not quite to the same degree as Arin. She herself has noted that she has never been good at expressing emotions. Furthermore, she can be quite incongruous and oblivious to current events. After Levi craftily used a hoax of her Final Spell, Lugh would not realize Levi's deceit until after Master Liber revealed that she had been fooled. Nevertheless, Lugh is dedicated and loyal to her goals and allies, willing to fight and support them in dangerous times. She has shown genuine concern toward her comrade Hijiri, once defending her against an attack from Akio. Moreover, Lugh has even aided her enemies, choosing to continue supporting Arata in his clash against Abyss Trinity.

However, despite her seeming impassiveness, Lugh has displayed various emotions on certain occasions, such as becoming embarrassed in perverse situations. Following Arata accidentally falling on top of her and touching her left breast, she was quite flustered and even more surprised after he ignored her afterward. Additionally, as a thief, she has a great love for treasures, able to sense them even if their presence is hidden. Lugh would even become willing to marry Arata so she would inherit his treasures as his wife. She has also been shown to have a mischievous side, sometimes acting in a crafty and humorous manner. In once instance, she would attempt to defeat Arata after defeating the patrollers in Sky Library as promised.

Lugh has a great deal of confidence in her combat abilities, even ranking herself as the second strongest person in the world. Throughout battles, she usually remains as her calm self, able to quickly ascertain enemies' aptitude, as well as decide on the best course of action to fight. After being trapped by Selina and Lieselotte's magic, she would choose to break one of her legendary treasures to escape as her better option despite the decrease in strength. Lugh can also be quite ruthless sometimes, willing to use extreme and violent force to defeat her enemies. During her assault on the Royal Biblia Academy, she would significantly incapacitate Levi causing serious damage, as well as nearly killing Selina. Due to her great strengths, Lugh can be arrogant on some occasions, however, she can also be greatly surprised by unexpected events.

Lugh is also power hungry who is obsessed for Judecca and wanted to wield the sword. When she was unable to wield, she is determined to become Arata's wife in order to use Judecca.

It was revealed that Lugh enjoys shibari play, as she got excited over watching Kirigakure Charme getting bound by the snakes in Chapter 2, and goes as far as getting caught by them despite being able to avoid them at her speed.

Appearance
Lugh is a young woman with a modest bust and long white hair tied into a ponytail fashioned a large dark hair clip ornament. However, her most notable feature is her dark eye patch worn over her right eye to allow her to utilize her magic more efficiently.

Her normal attire consists of a black, high-necked, sleeveless unitard worn over by a red off the shoulders kimono with dark hems held together by a yellow obi and white cuffed ankle boots.

Magus Mode: Currently, Lugh has yet to manifest a Magus Mode.

History
Some time ago, Lugh managed to sneak into the Sky Library and steal three legendary treasures, becoming a Magic King Candidate. She would also eventually join Iscariot where she met Master Liber and Hijiri.

Assault on Biblia
She battled Levi while the other members of the Trinity Seven were at the Royal Liber Academy. When she defeat Levi. When she was bound by Liese, she overloaded her [Virtus Arm] "Light Piercer Brionac." She had to choose between either breaking one of her weapons or continuing being unable to move.

Abilities
Ildanach Known as the "God of Light", Lugh is a master of high-speed Ildanach magic from the Invidia Archive, as well as a Demon Lord Candidate. Considering herself as the second strongest person in the world, she was even described by Yui to be stronger than even the Trinity Seven. Ildanach allows her to perform Luminesenc, becoming the "equivalent of light", or moving at the speeds that cannot be tracked by the eye. As such, she is able to evade almost any physical attacks from touching her. Furthermore, her quick reflexes help protect her from ambushes, capable of fending off sudden surprise attacks from Levi and even the Paladin Ayesha. Notably, Lugh intentionally covers one of her eyes to better visualize light one-dimensionally.

Lugh also have the ability to use a magic first and then declare the incantation later. This gives her advantages because she can defend against enemy without time lag for incantation, or attack enemy without them knowing what she will use.

Additionally, Lugh is a very skilled swordsman, able to wield a katana in each hand proficiently during skirmishes. Along with her Ildanach magic, her swordsmanship becomes more difficult to defend against, being able slice through anything at the speed of light, as well as split herself into multiple copies to perform simultaneous strikes instantaneously. Lugh also possesses a considerable amount of strength, able to launch several swift strikes capable of shattering even Yui's magical defense. In team battles, Lugh can carry her partner while moving at high speeds to appear as if they disappeared, which allows them to ambush their opponents at their discretion.

During battles, Lugh usually possesses a calm and collected demeanor, generally able to quickly rationalize her next move in battle. During her fight against Levi, she determined against using a "Last Crest" that risked the user's life was unnecessary as she was a Magic King Candidate. Lugh also possesses a strong sense for treasures, able to detect their locations even if they are hidden.

However, Lugh's Ildanach magic is notably weak against Lieselotte's and Selina's Logos Art magic, particularly the latter's binding spell which can imprint "a single moment of light onto film". Another method that has been proven to be effective against her is trapping her from all directions to prevent her from moving, as demonstrated by Levi's Final Crest hoax, and later her use of threads.

Techniques

 * Limit Break - By overloading one of her Mythical Armaments, Lugh is able to break free of any magic retraining her. However, using this causes her to be unable to use that weapon for a limited time.
 * Light Slasher Fragarach - Wielding Slash Fragarach, Lugh thrust the weapon forward while charging towards her opponent.
 * Gae Assail - Lugh, while brandishing Brionic, charges at an opponent before striking.
 * Five Pointed Crown Spear (Ibar) - Lugh summons beams of light that can inflict damage on several enemies.

Weapons

 * Dual Katanas

Mythical Armaments
Stolen from the Sky Library, Lugh possesses three legendary treasures, available only to those who have mastered a Thema, which allows her to fulfill the conditions to become a Trinity. Upon summoning the Mythical Armaments, Lugh's speed and power become greatly enhanced. She was able to substantially wound Levi instantly without the latter's realization, as well as forcibly removing Selina's binding spell quite easily. Lugh herself has commented that she can never seem to fully control her strength when in this mode.

However, if any of the armaments become destroyed, Lugh becomes unable to summon then for a while.


 * Light Piercer Brionac - Resembling a large katar, Lugh, usually wielding Brionac in her left hand, is able to simultaneously strike multiple targets instantaneously.
 * Slasher Fragarach - A sword usually held in her right hand, Slasher Fragarach is capable creating light beams that cause damage from afar.
 * Light Wings Claiomh Solais -  An artifact resembling wings that appear on her back, Solais allows Lugh to float midair, as well as create light beams to attack from a distance.
 * Light Magic Gun Tathlum - A large pile weapon. According to Lugh, it's a weapon to destroy demons. To activate, the weapon is stabbed into the ground, then it will shoot out projectile that chase and destroy the target.


 * Machine Mode - When Master Liber breaks the seal of the Arbitrator, markings cover Lugh's body, and she receives Arbitrator abilities temporarily. Even when she is injured badly she is able to stand normally, as if she is new. When Lugh is in this form she becomes a completely different person, only with the intent of obliterating the enemy. However due to the pressure of the overwhelming strength and not being an Arbitrator, it only lasts for 10 seconds.
 * Speed of Light - Lugh speed double from her original speed of light to the point that she seems nearly invisible that not even the fastest Arbitrator, Faunaria was able to see her.
 * Salt Swords - Lugh is capable to conjure swords made out of salt that are extremely sharp. By combining it with her speed she is able to attack about 10 times faster than her normal attacks, injuring the enemy to the point where they cannot even fight back.

This Mode is quite taxing for Lugh after 10 seconds pass all her previous wounds and pain return, spitting out blood and falling unconscious.

Iscariot
Hijiri Kasuga - As a member of Iscariot, Hijiri is a comrade of Lugh with the same objective of stopping the Magic King. The two seem to get along very well with one another, treating each other in a friendly and respectful manner. Lugh, in particular, seems to care for Hijiri's well being, becoming concerned over her unstable health and even willing to fall along with her if she ever tripped, much to Hijiri's astonishment. She would attempt to defend Hijiri from an attack from Akio, eventually leading to her capture. Although, on other occasions, Lugh has also been shown to be sometimes intimidated by Hijiri's behavior, once becoming frightened during Hijiri's first meeting with Anastasia-L. Nevertheless, Lugh and Hijiri both appear to care and trust one another. Notably, their teamwork has been described as focusing on the offensive.

Royal Biblia Academy
Arata Kasuga - As a Magic King, Arata is an enemy of Lugh, a member of Iscariot. In their first meeting, Arata accidentally groped specifically her left breast after suddenly landing on top of her during Iscariot's assault on Biblia. Embarrassed by their initial encounter, Lugh would become surprised by Arata's later nonchalance to the event, as well as mistake his action as an attempt to make her his mistress. The two would later again meet during their mission to Sky Library, where they would mostly get along despite being adversaries. Even after Lugh attempted to betray him, Arata would continue to treat her in a friendly and jestful manner. Lugh would also begin to become more accepting towards Arata, supporting him in his battle against Abyss Trinity. Notably, after Arata gained possession of Judecca, Lugh declared that she would become his wife, as the husband's belonging would also belong to the spouse.

Trinity Seven
Levi Kazama - As members of Trinity Seven and Iscariot respectively, Levi and Lugh are adversaries due to their individual own views of Arata, the Magic King. First encountering one another during Iscariot's incursion on the Royal Biblia Academy, Levi would fight against Lugh to protect the school albeit with great difficulty. Lugh, while considering herself the superior fighter, would come to respect her skills and abilities, causing her to becoming serious for their battle. Likewise, Levi would also treat her in a courteous and friendly manner, as well as acting craftily during one portion of their skirmish much to Lugh's confusion. Even after being defeated, Levi would not seem resentful and continue to behave amiably as always.

Trivia

 * Lugh shares the same name of an Irish deity, who was known as the God of Light as well as Ildanach. Her mythical armaments are also references to several Irish mythology relics:
 * Brionic, known as the Spear of Lugh, is one of Four Treasures (or Jewels) of the Tuatha Dé Danann.
 * Fragarach was a sword of the sea deity Manannan before being passed down to the god Lugh.
 * Claíomh Solais, also known as the Sword of Light (or Sword of Nuada) is another one of the Four Treasures of the Tuatha Dé Danann.
 * In the spinoff novel Trinity Seven-san, Arata notes that a way to catch her is to use a treasure as a bait.
 * Fun Fact: She is a masochist kind of person based on her reactions when she gets tied up, yet she denies it.