The Soror was a very special caste of the living soldiers, somewhat similar to the nightbirds due to being an all-female group that had been personally nurtured by Loimos, both entertained a very special relationship with the champion that went beyond the usual admiration and respect shown by others.
Failing to meet the demands of a higher-up and war hero was one thing, but failing to meet the expectations of someone considered a parent was something else entirely.
Furthermore, the Soror was a somewhat experimental unit, the sisterhood wasn't merely a concept or idea, it had been present before Loimos even took them under his wings, the bond shared between each of the individual members was perhaps even stronger than that united blood-related siblings, each of them had helped pulled one another up to the level they now stood at.