Unlockable Characters

Cruz           In BF23, there's a little area near the exit. Go to it 
               and a new exit will appear. Go there and you will end up 
               at BF23.5 where you will recruit Cruz

Mistel         Search all two of the villages in BF13. You'll be taken 
               to BF14I/II and you'll get her.

Nietzsche      In the map with the undines go all the way down 
               in one town she be waiting for you.

Pamela         You recruit her in BF23 or BF24, by placing Nietzsche 
               near by her - HARD MODE ONLY.

Russell        In BF20, head left and you'll eventually find Flone. 
               Save her from Aegina and then place any character 
               next to Russell in BF21.