No. No, not Aziraphale. Crowley sees him, surrounded by all the fire, and he remembers the bookshop, remembers seeing all the fire and knowing he had lost him forever. Knowing it in his soul and how much he grieved in that moment. This was that moment again. All the Hellfire around Aziraphale, him not running, instead choosing to face down Hastur.

"Brave," Hastur says. "But you can't defeat me." He raises up an arm and points it at Aziraphale.

Crowley has no idea what Hastur is about to do, but he has to stop him. There has to be something that he and Aziraphale can do with their limited competence combined. He grabs his crowbar off of the ground and swings it at Hastur's midsection from behind. It clangs, but invokes no reaction from the Duke.