For many, being told that you must undertake a dangerous journey of almost 1,000 miles on foot with a man you barely met, leaving your loved ones behind and unsure of returning alive, would be more than enough to put us on a knife-edge. But to find out at the beginning of the journey that this man has raped your only daughter... Wow.
I have a 16 year-old daughter. I have never been a killer, but if someone raped her, it would give me great satisfaction to carve him into pieces with my kitchen knife. Yet Atiaran puts her personal desires for revenge aside because she so strongly believes in Covenant's mission to Revelstone. She nobly defers justice to what the Lords choose to do with him after he has delivered her message.
But even bigger than that is her choice to accompany a person who has done an atrocity his first 24 hours in the Land; but whom she cannot see to know his intentions toward her; every night she must have fallen asleep shaking with fear of what he might do to her. And yet she makes sure he has a blanket, and food, etc., and her conversation with him is terse, but free from vituperation.
As they traverse the hills at the edge of the South Plains the smell of wrongness-- of evil-- overtakes them.
She seems to imply that the murder could very well be hers. And yet she carries on. Melenkurion Abatha! No wonder she moved so fast, it must have taken every personal resource she had not to run away from him. In fact, maybe she was partly doing that. It didn't take health-sense, surely, to see how he labored to keep up with him. She could have left him behind and carried his message (which he had already disclosed) herself to Revelstone. Maybe she was almost hoping something would happen to him... then she could keep her Oath..."It is murder," Atiaran replied flatly, and quickened her pace to pull away from him. Do not ask me to forget, her back seemed to say, and he stumped fuming after it.
I am just blown away by Atiaran on this read-through.
Of course, it changed after Soaring Woodhelven. Which reveals that a lot of her anger toward him (justified as the rape made it) was based in her own self-doubts. The Woodhelvennins' acceptance of him, the test of the lomillialor, and the news that their path would take them to the Banas Nimoram redeemed her choices.
But her anger (both at Covenant and herself) was renewed by the ur-viles' desecration of the Celebration, and she would not forgive him for not killing her.
EDIT: What makes Atiaran so real is the psychology whereby we deflect our anger, fear, or hatred to other, less direct issues. Atiaran projected her own, very justified sense of injury and rage to the desecration of the Wraiths' dance. Perhaps that seemed more righteous, more justifiable to her, than her fury over Lena's rape, and the accumulated stress of her fears for herself (which are never mentioned but as a woman, I can speak for what she must surely have been wrestling with). Or perhaps it was "safer" to rage about that than about her own issues.
In any case, SRD does what he does best and leaves us completely unresolved, with Atiaran rushing off alone back to Andelain to find what healing she may on her way back to Mithil Stonedown. And we have the distinct feeling that bill will come due some day (which it does, with a vengeance).