Hastur, or Quite Possibly Ligur
Crowley's not sure what to do about this LOL. He's an angel, dammit, not a demon. In fact, he's so caught up in his thoughts that he doesn't stop to think about what might happen if he goes to see if Aziraphale would have any idea how to get him out of this mess. If he'd actually stopped to think about it, he might not have rushed over to the bookshop in the Bentley like a bat out of hell. He might not have parked rather messily on the curb. And he might not have burst into the bookshop shouting for the angel at the top of his lungs.
But he does. "AZIRAPHALE!"
But he does. "AZIRAPHALE!"