Ouroboros (Bravely Default)

Ouroboros is the main antagonist of Bravely Default, and acts as the final boss of the game. He is referred to as the "god of destruction", and is the one who sends Airy on her quest to awaken the crystals in multiple worlds to facilitate his ascension.

Appearance and Personality
Ouroboros is a large and terrifying monstrosity with several tentacles and arms. He has a large horn on his head and a jewel on his face that serves as a regenerator system.

He is extremely callous and self-centered, viewing even his most important and loyal servant, Airy, as similar to cattle, a beast of burden to be devoured after she outlived her usefulness. He displays extreme arrogance and indifference towards most things, often finding joy on "amusing" things while disregarding those that are "boring" and also even claims he wants to bring destruction, corruption and several negative aspects into the Celestial Realm only because he finds its peaceful nature to be plain. Cruel and sadistic he takes enjoyment in toying and tormenting his victims, when he destroyed several worlds just to demoralize and break the party emotionally.

Story
Ouroboros is a deity who desires to consume all realities and reach the Celestial Realm, planning to destroy it and create reality in his image. In order to accomplish this, he uses his servant Airy to travel to the multiple versions of Luxendarc and overstimulate the crystals, causing them to create a link through all realities that would give Ouroboros passage: The Great Chasm. To this end, Airy tricks and exploits multiple versions of Agnès Oblige, Tiz Arrior and Edea Lee.

However, the first version of Agnès managed to send out a warning through the Celestial Realm which reached Sage Yulyana and Lester DeRosso, as they established the Council of Six with the intent to stop Ouroboros, but not to harm those Airy is manipulating. However, the only one to know of the ancient founders' intent, Braev Lee sees stopping the wind vestal by any means as the only way to ensure Ouroboros does not come. Eventually, joined by Ringabel, the latest version of the group learn of these truths after Airy decided not to kill them and instead use them to link the five remaining worlds before departing to meet up with her master.

Intrigued by Airy's defeat by the group when they pursue her, devouring her once she outlived her usefulness, Ouroboros is forced to assume the forms of Tiz and his party to interact with them and reveal his plans while sensing a Celestial within Tiz. Ouroboros then drags the heroes into the Infernal Realm to fight them in his true form, displaying his ability to regenerate before DeRosso arrives to enact his role in the demon's defeat by merging into Ouroboros's core to halt his regeneration. In the battle that follow, Ouroboros shows his ability to destroy and consume worlds that Airy already linked to force the group's unconditional surrender least their homeworld ends up being obliterated. Luckily, the party enlist the aid of their other incarnations to disable the link before they finally defeat Ouroboros.

Battle
Ouroboros is fought as the game's final boss, in a series of five battles. He is first faced while assuming Tiz's form. The next four battles feature his actual appearance. Each battle includes an increasing set of skills, and has different criteria for entering the next battle. Ouroboros is only able to be killed in the fifth and final battle.

Musical Themes
Ouroboros' theme is Serpent Eating the Ground, which is also the Final Boss Theme in Bravely Default. A loop of the first half plays during the second and third battles, while parts of the second half are heard during the cutscenes between them, and during the fourth battle part of the second half is added. The full theme is only heard during the fifth and last battle.

The second half samples many themes from the game, these being Land of Light and Shadow, the main characters' special themes and Overture to Hope, the game's Main Theme. Interestingly enough, the first half sounds similar to Bizarro Sephiroth's battle theme, | Birth of a God.

Etymology
The Ouroboros is a symbol often representing the cycle of life and death.