Board Thread:Warhammer 40k General Discussion/@comment-174.29.74.18-20130615110043/@comment-3580035-20130617073413

Grey Knights not interacting much with Daemons...an interesting concept considering that their sole purpose if to be exposed to them and fight them.

Miriael is the only Sister of Battle to willingly turn to Chaos. Everyone under her command didn't do it willingly as such, but were corrupted as you say.