Hanun, Arnen, Hakan, Durandal

So, let's just start with the reward for the first bounty quest, which is :
Shining Official Bounty Hunter Boots
(Level 6, Durability Enhancement 3, Socket 0, Defense after 3 Novice Armor Scroll : 25, Bonus : Hit Rate 1,1%, MP Increase 13)

When you chase the Channel into Arnen Castle, there's an Improved Treasure Box in the map where your team are surrounded. And after that in the Hakan Desert you'll find another Fusion Machine but this time you didn't get any quest from it. Also there's another Bounty Hunter who'll give you a quest. You will report the quest not to this Bounty Hunter but rather to the Bounty Hunter at the next town.

At the Hakan Desert i got the Mithril needed to make Durandal for my Kiyan and after 2 Novice weapon enhancement Scroll the weapon stat become :
Physical Damage 39, Magic Damage 31, STR 1, DEX 2, VIT 2.

There's a chance to get Treasure Box at the Hakan Desert where the Fusion Machine is but I haven't see it spawn Improved TB. A legendary Sword is also spawn randomly here but my lv 12 char isn't able to pull it out.

Next stop : reward for the bounty quest, the legendary sword and more improved TB