She does not relax when he touches her, but she doesn't push him away either. His words do cause the rest of the anger to fade away, the fangs releasing her soul from their grip.

"I wish I could pretend with you that sacrifices don't have to be made. I have to know what the rules are before I will cut them down with you. What risks we may face if I fight by you and Yato. Knowledge is the ultimate power, it is how we will win."

She almost can't believe he is offering his soul to her again, but that is what she asked of him, back before she and Ari had their contract.

"I do not think weakening you now will help Yato recover. For his sake, I will decline." Unspoken And yours.