Aziraphale looks at him like he's got two heads, which would be preferable, because then he could probably afford to lose one.

"I... I suppose," he says, being the risk-averse angel that he is, he isn't about to join Wei Wuxian in this endeavor.

He just reacted to the beheading so calmly. Even Aziraphale hadn't wanted to be beheaded, when he could've just gotten a new body. He didn't want to! He liked this body! "But... they don't like it when you ask questions. So... if you could..."

He leans in very close, and whispers: "do so quietly!"