I've always like reading Good Omens fic about other being's perceptions of Aziraphale and Crowley, so it was great to see Biafriel and Siouxiel react to them. I especially like how they saw Crowley and instantly thought “he must be the one with the car.” I like your description's of Heaven's topography and hierarchy, particularly the technicolor sea and the reference about sushi. The last part about them becoming more angelic as Crowley and Aziraphale became more human was great.