All of the following are located under Characters on the Gallery menu after the required task is met.
Effect - Code
Arslan - Finish Landing at Nanvia
Azure Dragon - Achieve Total Conquest with Azure Dragon
Bramble - Finish Divide & Conquer Faylinn
Devil King - Achieve Total Conquest with Devil King
Etc - Achieve Total Conquest with any character
Frost - Achieve Total Conquest with Frost
Hornet - Achieve Total Conquest with Hornet
Irdene - Finish Storm on the Great Plains
Iron OX - Achieve Total Conquest with Iron OX
Kahz - Finish Flooding Giuthas Nam
Lady Butterfly - Achieve Total Conquest with Lady Butterfly
Lark - Finish Divide & Conquer Faylinn
Muri - Finish Ambush at Shadow Gorge
Orwik - Finish Siege of Dark Spire
Puff - Achieve Total Conquest with Puff
Q-Ball - Achieve Total Conquest with Q-Ball
Reaper - Finish Crossing the River Styx
Red Minotaur - Achieve Total Conquest with Red Minotaur
Scorpio - Achieve Total Conquest with Scorpio
Talon - Achieve Total Conquest with Talon
Venus - Achieve Total Conquest with Venus
Zaan - Finish Leveling Kush
Fight your own army
Complete all 12 conquest modes.
Unlock Frost
Beat Conquest, any difficulty, with Venus.
Unlock Hornet
Beat Conquest, any difficulty, with Devil King.
Unlock Iron OX
Beat Conquest, any difficulty, with Scorpio.
Unlock Puff
Beat Conquest, any difficulty, with Azure Dragon.
Unlock Q-Ball
Beat Conquest, any difficulty, with Lady Butterfly.