So you're in Nisan. Clear the town of guards. There are 5 encounters to complete. I suggest training your 7 AP Deathblows on these guys. You may have to move closer to the center of town to find the last 1 or 2 guards. After that, you'll reach a junction where you need to select a 3rd member for your party. It will be Fei, Bart, and whomever you choose. Select Citan for some additional dialogue. He can't come along. Anyone else is OK though. The choice isn't so important this time.