[@TheWindel] The reasoning for her character is that due to oath shenanigans of magic before they came into the nexus, the fellow knight's souls are bound into her weapon, before Angel of Death can resurrect them. However, if that doesn't work for you, I can think of something else.

I don't think what you mentioned would work, because if they all did decide to work for different factions, it wouldn't be very dramatic, because

A. Then Alexi wouldn't slowly be going crazy from voices in her sword*.
B. If the Knights go Team Angel.. Alexi would just totally join up with them again, and my goal is to have one chary for each faction.
C. If the Knights go Team Demon.. Smitey smite smite. Ok that'd be kinda fun, but it'd also be out of character for ALL of the knights to do that, maybe one or two.

*Which has already claimed poor Fran.