The blade. What Karou saw was peripheral. If her hand couldn’t catch the blade, her head couldn’t turn fast enough to see it enter Akiva’s heart. His heart that she had pressed palm and cheek to, but not yet her own heart, not her own chest to his, or her lips to his, or her life to his, not yet. The heart that moved his blood, and that was the other half of her own. She saw from the corner of her eye, and it was enough. She saw. The blade entered Akiva’s heart.