Oh... the realization is less lightning bolt from the blue and more round peg finally fitting into the round hole. Lady Eiko had convinced herself that it would be in Emma-O's interest, above all others if he abandoned the darkness he has cultivated... which would not so incidentally allow her to restore her Dharma without losing the parts of herself that have been claimed by the Lord of the Night Realm. That is why she had been asking about forgiveness, redemption, not for herself but for her lord.
"Yes..." Usum's voice is barely even a whisper in your mind, more of a hum, vaguely appreciative at that. "If she has a standing order to follow her lord's interests that might be enough to step around or even eschew many lesser priorities, but surely not all. If this became known to Emma-O, that one of his servants seeks to shape him, his wrath would be beyond words." Now he is giggling, an eerie near-musical sound, like silver bells recorded on half-ruined tape.