Crowley was on his feet as soon as the vial hit the ground, only delayed for a pained moment at the scream before he was kneeling at Aziraphale's side. He watched with a sense of wonder as the angel's wings lightened back to white. He didn't touch, sensing the renewed Purity off his Love's form. But he refused to back away, wanting to feel like he was doing something, even if it was just suffering along with his lover.