Deserters refers to people who were once working with or for the crusaders, but escaped or abandoned their cause for one reason or another. These people often end up working against them in some way, shape, or form and become Missionaries.

The deserters are as follows, in chronological order:
Vi (returned later on, however)
Jace
Sierra
Connor
Rei
Pherenix
Cat
Zeph
Chrys
Kore
Catherine
Birde
Jaylo
Soren
Kieran

After these, the rest of the deserters included people leaving because the organization was falling apart.