Complete the indicated task to unlock the corresponding character in Mercenaries mode.

Character	How to unlock
Ada	Complete Ada's Campaign.
Carla	Unlock all other characters' costumes.
Helena	Complete the Urban Chaos map with a "B" or higher rank.
Piers	Complete the Steel Beast map with a "B" or higher rank.
Secret BSAA Soldier	Unlock all other characters and their costumes.
Sherry	Complete the Mining The Depths map with a "B" or higher rank.