Her hair was very large, but Castiel didn't notice it. It was simply a part of a whole, as integral as an arm or a leg. He assumed that humans didn't see it that way, but given that he'd recreated at least one, he felt his assessment was as accurate as any. As for her actions...she couldn't see them, but his wings did draw closer. Partially because it was familiar, but partially because he suddenly felt displaced. Her feelings were very similar to his own at a time.
"I understand what you mean," he said, nodding. "In Heaven, there are only orders. For angels, at least...and if you do not do what they say, there are repercussions."
He could never quite remember those repercussions, but he knew of their results. They'd made him forget the incident with Uriel. With Sam and Dean. They'd made it so he momentarily stopped caring for the true mission at hand and they'd taken Anna and made her a weapon once more. And she'd died because she failed. He was also on their list to be destroyed for disobedience. It'd happened to so many angels and he'd not been able to stop any of it.
"Or at least...the repercussions are used as a means to make angels obey. It does not mean that disobedience is something to be reviled. Free will is worth it."
He felt Helena understood. She was also exploring her free will and thus far, he had yet to hear of anyone being hurt. It was why he refused to believe she was inherently dangerous. Perhaps if provoked, but...anyone could be dangerous in such an instance.
On the subject of the barrier, he sighed, though he didn't require breath. "It may require a large amount of energy to maintain itself," he suggested. "Though I feel a more plausible theory is in relation to its merely being unstable. There are holes and various anomalies fall through the cracks. We do not belong, yet we are somehow viable enough that it, if it is an it, registers us as belonging."