User blog comment:Supahbadmarine/Canon Discussion 3:THe Warp, Chaos and Gods/@comment-4964060-20131117165030/@comment-4964060-20131117165534

As for "reformed" Chaos Characters, I'm not really sure about that. A lot of Chaos Followers that actually do realize they're doing the wrong thing also realize that they're too far into the deep end to pull themselves out, and just deal with it and become full on followers. With this in mind, a lot of Chaos Followers don't even realize that they are following Chaos until it is too late, and then go through the process I just explained above. Examples of this include the Fallen Angels and even the Primarch Fulgrim.

In any case, "reformed" Chaos Followers doesn't seem all that feasible in my mind.