Adventurer (Bravely Default boss)

The Adventurer is an optional boss in Bravely Default, and the hardest adversary in the game that is not a Nemesis. As in Final Fantasy: The 4 Heroes of Light he is fought alongside the Faithful Fox, known in-game as Comrade.

Battle
The Adventurer will start by using regular attacks and Mass Slash, which deals severe physical damage to the entire party but costs 1 BP. However, to assist him with BP, the Comrade will use Adventurer's Friend which gives him 3 BP and costs the Comrade nothing to use. This becomes very dangerous as he will start pairing his attacks with Brave, usually either using Mass Slash twice or Meteor twice. As the Adventurer's HP goes down, he will start getting desperate and brave into negative BP more often. However, he will rarely brave more than once.

Meanwhile the Comrade will assist the Adventurer with Blind and Dispel, which are always group-cast, delaying the party's physical attacks and forcing them to re-apply buffs. In addition to Adventurer's Friend he offers direct support through the use of Curaga once his HP becomes low. If the Comrade is defeated, the Adventurer will revive him on his next turn with Call Comrade. If the Adventurer is defeated but the Comrade is still alive, he will use Arise, reviving him and restoring all of his HP.

Strategy
Because the Comrade has the Protect Ally passive ability, strong AoE attacks work best against the Adventurer. A Vampire's genome abilities, especially Firestorm or Firaja, Blizzaja, Thundaja or Aeroja, work well. They are also helpful for reducing the Adventurer's Physical Attack and Magic Attack through Absorb Stats and Curse. A Templar (Bravely Default) is also useful for Rampart (Ability) which will minimize the damage of Mass Slash. Similarly having a high Magic Defense will reduce the damage of Meteor (Ability), which can easily deal 9999 damage if it hits one character three times.

Once the Adventurer is almost dead it is vital the Comrade dies on the same turn, or it will be basically game over. Therefore if AoE attacks will leave the Comrade alive, use some single-target attacks to reduce the Comrade's HP before taking them both down.