Brain Unglaus

Brain Unglaus (ブレイン・アングラウス) is a warrior turned mercenary after he lost to Gazef Stronoff in a grand tournament to determine the strongest fighter in Re-Estize Kingdom.

Appearance
Brain Unglaus has brown eyes with blue hair and the appearance of a wild beast. His equipped with a chainmail and wore a necklace and ring, which were infused with protection magic. His whole body is lean and his muscles are tough as steel and tempered through experience.

Personality
When first introduced he is very arrogant, thinking that he is the most powerful, even though he earlier lost to Gazef. His personality changes drastically after having a run in with Shalltear. Having his confidence completely crushed and getting a feel of what true terror is like, his attitude changes to one where he is completely depressed, hinting at a suicidal tendency.

He eventually does a complete overhaul after meeting Climb and Sebastian. He changes to a much friendlier person that start to think that strength is more then simply being skilled with a sword.

Background
Originally a farmer, he was gifted with what could only be described as a god-given talent in the mastery of the sword. He has always believed himself to be the strongest fighter inside the Kingdom, having never lost a fight before he entered the grand tournament to decide the King's guard captain. He easily fought his way to the final where he faced off against Gazef Stronoff. A grand and close battle ensued between the two, but eventually he would taste his first defeat at the hand of Gazef.

His fame was shattered and his confidence as an unbeatable warrior took a hit. He then decided to do everything he could to become stronger, so he would truly become unbeatable. At the same time, in order to make a living he started working as a mercenary for the Death Spreading Brigade.

The Bloody Valkyrie Arc
While hideout of the Death Spreading Brigade was being attacked, Brain tries to defeat Shalltear Bloodfallen but suffered a devastating defeat, failing to even scratch her. His absolute confidence was shattered by the immense difference of power between him and the vampire, he fled crying, escaping the massacre through a hidden exit.

The Men in the Kingdom Arc
and II Arc Brain retreated to the capital city of the Re-Estize Kingdom, in order to hide from Shalltear. Gazef finds Brain slumped on the side of a street and brings him back to his place. Brain is still shaken by his momentous defeat and uses his time to recuperate. Whilst walking through the streets, Brain overhears a commotion and discovers Sebas Tian, as he incapacitates the men, who were attacking a young boy. He follows Sebas, and Climb, into an alleyway where he sees Sebas release an extreme amount of killing intent, directed at himself and Climb. This was Climb's requested training under Sebas. After the bloodlust ends, Brain reveals himself and converses with Sebas and Climb before fighting off a group of assassins that were also following Sebas.

After defeating the assassins, Brain, Climb, and Sebas travel to the brothel where Tsuare was discovered. They attack the brothel and capture Succulent, one of the members of Six Arms, and a member of Eight Fingers, Cocco Doll, leader of the slave trade department. Following the battle, Brain goes back to rest at Gazef's house and they discuss the events and his defeat at the hands of Shalltear.

Later, Brain is sent to partake in another raid on the Eight Finger's hideouts alongside with Climb. He briefly talks with Gargaran of the Blue Rose before beginning the operation. When they begin, they have a scout infiltrate the compound they are to attack, who discovers that all of the remaining six arms are within the compound, along with a captured girl. As they are about to fall back, they meet Sebas, who came to rescue the girl, Tsuare.

Brain, Lockmyer and Climb all infiltrate the back of the compound in order to rescue Tsuare while Sebas deals with Six Arms. The trio use invisibility to infiltrate the compound and break Tsuare out of her cell. As they are escaping, they are ambushed by Zero, the leader of the Six Arms and are forced to fight. At the same time, they discover that the Tsuare, they rescued from the cell was actually Succulent in disguise. In the encounter, Lockmyer and Climb are forced to fight Succulent while Brain fights with Zero. Climb and Lockmyer defeat Succulent and as the battle with Zero and Brain nears an end, Sebas appears and defeats Zero with ease. Brain, Climb, and Lockmyer all exit the building, only to witness a wall of fire off in the distance, which is thought to be another one of the hideouts being currently raided.

Abilities and Powers
Brain is a Genius/Fighter class compared to most other melee oriented combatants who has the Fighter class as their starting class. While most learns martial arts that have been passed down through the ages, Brain has been developing his own unique martial arts.

Known Classes

 * Genius/Fighter
 * Swordmaster
 * Sword Saint

Martial Arts

 * Ability Boost: Raises overall strength of the body.
 * Fortress: Can be used to offset the enemies attacks.
 * Cutting Edge: Able to gather air to give an extra cutting edge to a blade.
 * Strong Assault: Increases attack power allowing oneself to damage someone with heavy armor.
 * Capacity Building: Increases the bodies overall capacity.
 * The Field: A unique martial arts that Brain himself has made, allows Brain to perceive everything within a three meters range. In simpler words, it raises the user's accuracy and evasion to the utmost limit.
 * Instantaneous Flash: The second unique art, allows Brain to attack at an extreme speed.
 * God Flash: Third unique art that came from practicing Instantaneous Flash millions of times, this attack is so fast that even when cutting through someone, blood will not stick to the blade.
 * Wind of the Great Forest: Brain's trump card. A combination of Field and God Flash. It was named after the sound of blood spurting shortly after severing the neck.
 * Heavy Blow: Raises the weapon's crushing capability.
 * Severing Blade: It would allow one to take down strong opponents in a single attack.
 * Fourfold Slash of Light: Martial arts of Gazef Stronoff, and the skill that defeated Brain in the tournament. Brain learned this skill by his own.
 * Front Cut
 * Oblique Strike
 * Vertical Strike
 * Crosses

Main Equipment

 * Katana:  Its a normal unenchanted weapon bought from a city in the middle of the desert located south of Re-Estize Kingdom. Its cutting capability surpasses those of ordinary magic weapons.
 * Necklace of Eye: It protected his eyes when activated. Resistance to blind status, night vision, light filtering.
 * Ring of Magicbound: allowed its wearer to bind a low level spell to the item and invoke it with the ring as the catalyst.

Gazef Stronoff
Brain sees Gazef (or at least used too) as his number one nemesis and rival due to his defeat at the hands of the Kingdom's Strongest Warrior. After having his self confidence crushed by Shalltear Bloodfallen, Gazef comforts him and Brain comes to respect Gazef and appreciates his kindness of helping him in his time of need.

Shalltear Bloodfallen
Originally, Brain used to look down on Shalltear and thought of her as nothing more than a foolish and arrogant demon that overestimated her abilities, though he did acknowledge she was an enemy worth using his full strength on. After Shalltear renders Brain's most powerful techniques completely useless with only her pinky finger, Brain's spirit as a warrior is broken and he realizes that Shalltear is an entity that cannot be defeated. He flees from her with everything he has and during his escape to the Kingdom, he is unable to sleep soundly due to having nightmares about her following him.

After meeting Sebas and Climb and having his confidence restored, he comes across Shalltear once again and despite knowing he is no match against her, decides to confront her again. Using his strongest abilities, Brain manages to cut off the tip of the nail of Shalltear's pinky finger and is tremendously joyful that his entire life of training wasn't wasted.

Trivia

 * In the web novel, he becomes a vampire under Shalltear Bloodfallen.
 * He managed to chip off Shalltear's pinky finger nail using Fourfold Slash of Light the second time they met.
 * He cried for Gazef when he was about to engage on a one-side 1 vs 1 duel with Ainz (Volume 9).

Quotes

 * (Facing Shalltear): "These foolish monsters that think they’re the strongest, they’re all the same. They think that humans are weak, that our bodies are fragile, our abilities nonexistent. But I will teach you how dangerous it is to underestimate us."
 * (To Gazef): "Stronoff! We can never reach the world of the truly powerful, no matter how hard we try. As long as we’re born human, this is the truth. In the end, we’re just children holding sticks. We’re playing with swords now, but we are still mere children pretending to be swordsmen."
 * (To Gazef): "Stronoff. Strength achieved from the sword really is garbage. It’s useless in front of true power."