In Bravely Default, how to delete a save file

The full set of bonuses are:

• Gameplay reward
  • Played demo version: Caldisian Relief Set
  • Antidote × 2
  • Eye Drops × 2
  • Echo Herbs × 2
  • Norende fully restored: Caldislan Adventurer's Set
  • Bronze Bangle × 1
  • Pheonix Down × 2
• Mid-boss reward
  • Melusine reward: Caldislan Recovery Set
  • Potion × 3
  • Hi-Potion × 1
  • Minotaur reward: Caldislan White Mage Set
  • Staff × 1
  • Ether × 1
  • Adamantite Shell reward: Caldislan Black Mage's Set
  • Rod × 1
  • Ether × 1
• Boss Reward
  • Dragon reward: Caldislan Soldier's Set
  • Bronze Helm × 1
  • Leather Armor × 1
  • Automaton reward: Caldislan Knight Set
  • Broadsword × 1
  • Buckler × 1

You can ask the soldier to the west of the Inn during the day which bonuses you earned are. He will tell you if you have them all at the end of his dialogue tree.

And finally, up to 20 villagers from Norende will follow you into the main game.

Bonus transfers will work for all save files in the main game. My sister and I were both able to take advantage of the bonuses I unlocked from the demo.

Having tried to build a tank in that game, I can tell you it doesn't work. At least, not the way it would in a MMO "holy trinity" type of game that most people think of when creating party structure nowadays. The items that make the equipper more likely to be targeted only do so by a small amount, certainly not enough to be noticable in my experience.

To answer your question, the enemies will decide who to attack on their turn. That is: when they're about to go, right before each hit, assuming they don't brave. They are also reactive to what your characters have done, not to what they are about to do. If you queue up a 4-brave healing spree, the aggro is generated when those heals are cast, not before.

Granted, even with the aggro, there seems to be a random factor involved to prevent "perfect" tanking. Because of this, the game seems to encourage powerful healers and group durability more than glass cannons and solid tanks.