Funnily I had your comment open in a tab to think of a good reply. I feel like there's comedy potential in Geralt knowing Crowley and Aziraphale separately and only later finding out that Crowley is Aziraphale's bonded-moron, maybe?? I don't know! But also, Crowley is a solid person to drink with AND will say what he thinks unfiltered way too often, which puts him under the 'will call on your bullshit' category.