Asbel - Formal
In Barona catacombs—the area where Sophie "died" while as kids. Examine the altar for a Model Boat. Turn this in to the maid in Lhant Manor.
Asbel - Swimsuit
Found in a pot in Oul Raye (port town in Strahta)
Asbel - Yuri (Vesperia Cameo)
Beat the Carta Guy in easy mode without letting him score a single point.
Cheria - Formal
In Barona castle, one of the rooms has an item needed for a request at Katz village. Turn the item in for her costume.
Cheria - Rita (Vesperia Cameo)
Beat the Carta Guy in hard mode without letting him score a single point.
Cheria - Swimsuit
Examine the right-hand desk behind the item shop owner in Sable Izolle to buy this for 100,000 gald.
Hubert - Formal
Behind the Strahta Valkines is a chest. Turn the item in the chest in at Katz village.
Hubert - Swimsuit
Inside the Rockgagon. Find the watermelon enemy for the costume. You can then exit out the butt.
Malik - Formal
At the end of Bathus Citadel on Fodra.
Malik - Swimsuit
At one of the gates to Yu Liberte is a man with a sub event smiley over his head. Talk to him.
Pascal - Formal
Head East of Oul Raye. Eventually you'll encounter a group of enemies and a scene.
Pascal - Swimsuit
you need the Amarcian key from a chest in the Bathus Citadel. Go to where her formal costume was. On the first screen, defeat the enemy wearing it.
Sophie - Formal
Go to coordinates X334.633 : Y180.499 on the world map, and talk to one of the turtlez (should be the middle one)
Sophie - Patty (Vesperia Cameo)
Beat the Carta Guy in normal mode without letting him score a single point.
Sophie - Swimsuit
Strahta Cryas ruins. There's an enemy along the West path from the save point.