Yeah, that's blood. Aziraphale can smell it from where he's standing. He tries his best not to wrinkle his nose as he takes the empty seat. The predatory smile doesn't dissuade him or disrupt his calm aura as he places his hands in his lap and faces the fallen angel.

"I did," he admits. "For either option, and I suspect you won't care for either of them, but my intention is not to ridicule or provoke you." He smiles enigmatically. "So, really, it's entirely up to you."