Elaida slipped through the cracks uncaught by the Red Ajah scheme twenty years ago that had a name called the Vileness. How did Elaida, and Galina for that matter, manage to slip through when three Sitters did not?
Elaida slipped through largely because she was minimally involved. Galina slipped through because there were enough Red sisters involved, at various levels, that taking them all down would have decimated the Red Ajah. The decision was made to punish the Ajah by exiling the Sitters, take off the top. And it was supposed to be a life exile, you are out of here forever. The only reason they were not stilled was that the Tower was trying to hide what happened, it was a major atrocity carried out in the name of the Tower, and it didn’t matter whether the Tower as a whole really wanted it or not, it was still a major atrocity and the Tower was at the heart of it.
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