Brain

Brain (ブレイン Burein) was the leader of the the Oración Seis, a Dark Guild composed of highly powerful Mages whose goal is to find a very destructive power known as Nirvana, which was sealed away long ago. Inside him dwells another, more evil and dangerous personality, known as Zero (ゼロ Zero).

Appearance
Brain has neat silver hair that reaches his shoulders, dark eyes and dark skin. He has unique markings on his face that take the shape of straight black lines, ones that begin to disappear when the members of the Oración Seis become incapacitated or killed. He is slightly taller and more muscular than most people. After Brain's alter-personality Zero is unleashed, his appearance changes slightly. His hair becomes wavier, his eyes have turned blood red and his skin becomes a much paler color.

His Oración Seis mark is located on his chest.

Personality
He does not respect his opponents, as he often calls them trash or maggots. He is willing to do all that is needed to achieve his goal, which is to awaken Nirvana, a very destructive magic. As a leader of a dark guild, he is cruel even to his comrades, as he attacks Cobra for losing to a regular guild. His comrades are just puppets for him, as he says that he can just find new ones when Nirvana is activated. He has two personalities: There is the face he shows to the world, which loves fame and goes by the codename of "Brain" and another hidden face, which loves destruction and goes by the name of "Zero". Brain may be disrespectful and cruel to foes and allies alike, but Zero just seeks to destroy everyone and everything. Zero states that from of his perspective, if someone or something has still some kind of form, he, she, or it is worth destroying. This kind of thinking even made him kill the seventh member of Oración Seis, Klodoa, without the latter provoking him in any matter. Brain seems to be somewhat afraid of his other self, Zero, so as a consequence he used every Oración Seis member as a "key" to lock his other personality away and when he was defeated, even warned the Light Alliance about him.

History
Brain once was in charge of the Bureau of Magical Development where he created hundreds of types of Magic, one of those being self-destruction Magic that he taught to Jellal. During his time working there, he took Ultear Milkovich from Ur, in order to make her more powerful and use her as a member of the Oración Seis guild. However, Ultear's power was too big, so Brain realized that he won't be able to make a connection of Six Prayers with her. Brain then left the laboratory right before it exploded by Magical power overload.

Brain was also responsible in taking five children with the highest Magical power at the time from the Tower of Heaven and trained them to become members of the Oración Seis Guild and six keys, which sealed his other personality, Zero, who only loves destruction.

Oración Seis arc
In the battle with the alliance consisting of Fairy Tail, Blue Pegasus, Lamia Scale and Cait Shelter, Brain doesn't take part, allowing the others to deal with them. Once their opponents have been defeated, he goes to finish it with a spell called Dark Rondo, gathering a mass of dark energy above him through his staff. Before he can fire it though, he spots Wendy Marvell and suddenly hesitates, implying that, like Natsu Dragneel, he has seen her before.

After he gets over his shock, Brain proceeds to kidnap her (and Happy unintentionally since Wendy grabbed him as she was being taken) and left the battlefield, firing the intended spell at the other defeated members to finish them off. Unbeknownst to him, Jura Neekis had saved the alliance at the last second. Brain then takes Wendy and Happy back to the Oración Seis's base and informs the other Oración Seis members of Wendy's healing Magic. He then has Racer bring in a coffin while the others continue to look for Nirvana. After Racer does so, he opens it and reveals Jellal Fernandes inside. Brain then explains to Wendy that he wishes for her to revive him since he could easily lead the way to Nirvana (as Jellal was in the Magic Council and thus knows its location from them) and that Wendy, who oddly enough knows Jellal, owes a debt to him as well. When Wendy hesitates, Brain grants her five minutes to make her decision. Ultimately she chooses to revive Jellal much to Brain's delight. However no sooner than Jellal recovered, he turns on Brain and knocks him to the lower levels of the hideout before leaving. Angered at this and believing Jellal will try to take Nirvana for himself, he has Cobra track down Jellal hoping he'll lead the Oración Seis to what they seek.

After Racer kills himself (or attempts to kill himself in the anime), an angry Brain awakens Midnight to kill the Light Team. As he continues to look for Nirvana, he senses that Angel has died as well and vows to not let their sacrifices go in vain (however, Angel is still alive). He finally arrives at Nirvana where Cobra tells him in a panicked state that Jellal has placed a self-destruction Magic on Nirvana. He is not worried, revealing that he has an extensive knowledge of Magic and easily cancels the self-destruction. Proclaiming Nirvana now his, he activates its second stage, and Nirvana shows its true form. He states that the legal guilds' strongest weapons, "trust and unity", are now useless. Natsu later manages to reach the control center to which Brain sends Cobra to defeat him. However Natsu manages to beat Cobra and knocks him back into Nirvana after a midair battle.

Cobra manages to get back to his feet despite his wounds and goes to finish the now weakened Natsu off but Brain attacks Cobra from behind, mortally wounding him. Surprised by this betrayal, Cobra listens to Brain's hearts and sees that he thinks the Oración Seis is weak for being defeated by a "common guild' before collapsing. Natsu questions why Brain would attack his own comrade to which Brain answers that he has Nirvana so he can create a new Oración Seis. He plans to start with Natsu after witnessing his power against Cobra. However, as he drags Natsu to the control center, he runs into Lucy Heartfilia, Gray Fullbuster, and later Jura. The power going to his head, Brain comments on how no one can stop him and his plans to start with Cait Shelter. Jura attacks him instantly, knocking him into a few stone structures before proclaiming he won't let Brain rest until he reveals his reasons for attacking that specific guild. Brain is easily defeated by Jura, but is still conscious and still has a way to get rid of them. Natsu and the rest of them realize that even though they have defeated Brain, Nirvana is still heading towards Cait Shelter. Brain then pretends to be Hoteye and sends a message to the group, saying that Midnight is in the room below the King's Room and that if he is defeated then Nirvana will be stopped. But unbeknownst to them, Midnight has actually encountered Jellal and Erza, and that the room under the King's Room is actually a trap set up by Brain. However, they were too late to realize this and were caught up in a huge explosion when they reached there.

When Midnight is defeated by Erza, it is revealed by Klodoa that all the Oración Seis members were acting as keys through Living Link magic to keep "another" personality within Brain sealed. However, now that they have all been defeated and thus all the keys unlocked, this new personality that loves chaos and destruction has awakened. This new personality is codenamed Zero and differs to the normal Brain by having black dilated eyes and white skin. When he arrives at Natsu, Gray, Lucy, and Happy's location, he quickly defeats all of them and sadistically continues attacking them even though they have been downed. Just then, Nirvana finally arrives at Cait Shelter. Klodoa states that the destruction of the guild will make sure Nirvana cannot be resealed; however, Zero shouts that such a reason is meaningless: he needs no reason to destroy. He then orders Nirvana to fire. However the shot is diverted due to the Blue Pegasus ship hitting one of the legs and knocking it off course. A revived Hibiki as well as the other Trimen members and Lyon and Sherry are show piloting it and keeping it in the air. Hibiki informs the others of Nirvana's weak points through his Archive Magic, but Zero intercepts the message, taunting the group that he knows where the weak points are and won't let them destroy it.

Unknown to him however, the others manage to get through to the fallen Fairy Tail members and encourage them to get them back to their feet. They get up and say that of course they can get up. Everyone picked a number from one to six for each of the locations of the Lacrima crystals and Natsu chose number one right away, which led him straight to Zero: because of his keen sense of smell he knew that Zero was there. Zero asked him what business he had left and Natsu replied by saying who's going to be destroyed in the end. The two start to duke it out again in which Zero explains that his powers are not exactly the same as Brain, but not before commenting on Natsu's performance being better than the previous battle despite being heavily wounded. He fired a Dark Capriccio from his hand and controlled it to continually attack Natsu. However Natsu managed to block it head-on which impressed Zero, but the battle was interrupted when Natsu got shot by Jellal.

Zero then states that Jellal's memories must have returned. However, he noticed that something was odd when Jellal told Natsu that he knew fire-based Magic wouldn't hurt him. Zero came to realize that Jellal did not regain his memories in which he replies that he remembers Natsu's name: a name which brings hope. While Natsu threatens Jellal, Zero says that they should fight somewhere else since they are annoying him. He then proceeds to attack them both with a Dark Capriccio to which Jellal blocks with his body to protect Natsu. Natsu then accepts the Flame of Rebuke from Jellal. Zero then states that by taking it he also shares his sins. He replies back by saying that Fairy Tail is no stranger to sins, and that the real sins are to ignore and stop believing in others. The two duke it out again but this time Natsu gains the upper hand. For the first time Zero seems frightened when saying "Dragon Force". Zero remembers that power being similar to the Dragons - a power that can destroy everything. The word "destroy" rekindled his interest to continue fighting him. However, it is Zero this time that is gaining the advantage and attempts to blast him out through the ground. Continuing to press his attacks on Natsu he then states that he hasn't learned to fully use it yet. Disappointed, he mentions that the Dragons' power once ruled the ancient world and questions that power he is facing is the same level as back then. He says to Natsu that he can't handle him on his own. Natsu answers back by saying that they are all supporting him and the power is flowing through him. Zero had enough and is pitied that he will have to kill Natsu, but he did enjoy the battle and gives him his best naught by his utmost Magic. Zero and Natsu both of then fight it all out with their strongest attacks: Genesis Zero and Crimson Lotus: Exploding Flame Blade respectively.

Zero hits Natsu full force with the attack and for a moment it looks like it'll overwhelm Natsu. However, Natsu manages to plow through, completely burning through and nullifying Zero's Magic. Then Zero realizes in horror that Natsu's Magic is that of a Dragon Slayer before he is hit by Natsu's Crimson Lotus: Phoenix Blade and tackled into the Nirvana core he was guarding. Smashing and destroying it (as well as knocking Zero completely unconscious) just as the members of the Light Team do the same to the other Nirvana cores, stopping the device once and for all. With this victory, Zero was completely and utterly defeated.

Magic and Abilities
Darkness Magic (闇の魔法 Yami no Mahō): Brain’s main source of offensive power, he has proven himself masterful in dark spells. To cast this kind of Magic, he always made use of Klodoa as a focus.


 * Dark Capriccio (常闇奇想曲 Tokiyami Kisōkyoku): A beam of darkness is fired from Klodoa (or in Zero's case, his hands), meant to be used as a drilling offensive attack that can pierce through defenses. Zero, however, has far greater control and is able to manipulate its movement with one hand, cast more than one beam at a time and even use it as a whip. "Capriccio" refers to a music style which is free in form.
 * Scream: A stronger and faster version of the technique.
 * Zero Slash: Zero uses Dark Capriccio as a whip and attacks the enemy. In the manga, this attack is unnamed.
 * Dark Gravity (ダークグラビティ Dākugurabiti): As its name implies, it amplifies the gravity in a certain area. When used against Natsu, he was sent crashing downwards through Nirvana's lower floors.
 * Dark Rondo (常闇回旋曲 Tokoyami Kaisenkyoku): When casted, dark Magic with horror-stricken faces swirls around Klodoa (or Zero's hands), becoming more and more condensed. Brain can then fire the gathered Magic on a wide scale (as he did against the Light Alliance) or focused at an enemy (as he did against Jura). The full effects of this spell are unknown, as it was stopped by Jura Neekis both times. "Rondo" is a music form derived from Italian which is based on recurring elements.
 * Dark Delete: Several spheres of darkness are fired continuously from Zero's hands. In the manga, this attack is unnamed.
 * Dark Barrier: Brain creates a transparent green barrier to protect himself from an opponent's attack. (Unnamed)


 * Genesis Zero (ジェネシス・ゼロ Jeneshisu Zero): Zero's strongest Magic attack. He first charges green darkness energy on his fingers and summons thousands of black phantoms to strike at his foes to the point of them being engulfed completely by their sheer numbers alone. This technique has been claimed to be capable of erasing a person's soul and their very existence.


 * Dark Wave: Zero darts towards an opponent and casts a giant wave of darkness around his clenched fist, attacking his opponent with this maneuver. (Unnamed)

Self-Destruction Spell (自律崩壊魔法陣 Jiritsu Hōkai Mahōjin): Brain knows how to easily undo this spell even when it's casted by a powerful Mage such as Jellal even without the cancellation code, being, in fact, the one who created the spell and taught it to Jellal in the first place.

Organic Link Magic (生体リンク魔法 Seitai Rinku Mahō): Brain has proven himself capable of using this type of Magic.
 * Six Prayers (六魔将軍 Rokuma Shōgun): A powerful, advanced spell casted on himself to seal his alternate, fearsome personality, Zero. Living Link Magic is used to make each member of Oración Seis a "key" to Zero's seal. Those metaphoric keys appear as tattoos on Brain's body, and each disappears whenever the corresponding Mage is defeated. When no keys are left, Zero emerges, taking over Brain.

Requip (換装 Kansō): Brain has proven himself capable of using this Magic when he requipped a dagger, which he used to hurt an injured Jellal to force Wendy to heal him. As Zero, he was seen requipping a different shirt after removing his cape and jacket.

Archive (古文書 Ākaibu): As stated and demonstrated by Zero, Brain possesses the same magic as Hibiki Lates, Archive, which allows him to store vast amount of data away to use them at his advantage, and even to transfer them to allies. This could explain how he has such a vast knowledge of Magic, and how he may have known about Nirvana and Wendy. It also appears to be an extremely rare ability, as Zero thought that this Magic was unique to Brain.
 * Telepathy (思念伝達魔法 Shinen Dentatsu Mahō): Brain has displayed great telepathic abilities, having been capable of mass-communicating with everyone in a wide radius, despite having suffered a heavy defeat from Jura just minutes before, and even to feign Hoteye's voice to draw his enemies in a trap. As Zero, he was capable of effortlessly jacking into Hibiki's own Telepathy to communicate with the Light Team.

Enhanced Durability: Brain has proven himself to be quite durable, being sent flying several meters down when Jellal cracked the ground below him, and emerging unscathed moments after from under the rocks that had fallen over him. As Zero, he is shown to have great resistance. In his fight against Natsu, while the latter obtained Dragon Force form, Zero showed an enhanced degree of assimilating enormous amount of damage without much problems. Just the full release of Natsu´s Magical power could damage him seriously.

Enhanced Speed: Despite his large size, Brain has shown to possess remarkably great speed, having been able to cover the distance of several meters which separated him from Jura in a second, appearing behind the Wizard Saint while he was still retaining his cast position. As Zero, he was shown effortlessly evading Natsu's attacks whiteout even assuming a proper fighting stance.

Enhanced Strength: As Zero, he seems to be quite strong, because he managed to pummel Natsu, an expert in close range fighting who possesses great strength in his own right, with nothing more but his sheer fists.

Immense Magical Power: As Zero, he possesses a large amount of Magical power. He can release his Magical energy into a potent aura around him, which can even make the ground shake. The Light Team described his Magic as the most disgusting one they had ever felt.

Equipment
Dagger: Aside from normally wielding Klodoa like a staff, Brain is shown to possess a short dagger, with an intricately decorated cross-shaped handguard, which in the anime was given a large green stone at the end of the hilt. He requipped it to stab Jellal, who was in a comatose-like state due to the effects of Etherion, in one arm, in order to alarm Wendy and force her to heal the man.

Fairy Tail Gekitotsu! Kardia Daiseidou
Brain (as Zero) appears as a playable character in the DS Game, Fairy Tail Gekitotsu! Kardia Daiseidou, upon being unlocked. In this game, Zero possesses the following moves:
 * Main: Dark Recordance
 * Sub 1: Dark Rondo
 * Sub 2: Dark Gravity
 * Sub 3: Dark Capriccio
 * Super: Genesis Zero

Fairy Tail: Zeref's Awakening
Brain appears as a mini-boss in the PSP Game, Fairy Tail: Zeref's Awakening. He also, as Zero, is the final boss of the Oración Seis arc.

Major Battles

 * Light Team vs. Oración Seis
 * Jura Neekis vs. Brain
 * Natsu Dragneel, Gray Fullbuster, Lucy Heartfilia & Happy vs. Zero
 * Natsu Dragneel & Jellal Fernandes vs. Zero