Both Secret Missions unlock at the same time. Each character has one.
|Unlockable||How to unlock|
|Louise and Kia's secret Missions||Complete Every Mission in one game(Without letting any missions expire). Every Mission has to have been comspleted with the A rank ending.|
I found one order you can play the missions in that won't let any of them Expire
Louise 4, Kia 6, Kia 2, Kia 3, Kia 5, Louise 5, Kia 1, Louise 6, Kia 4, Louise 1, Louise 3, Louise 2