[His laughter is an impression of it, more than any true sound, but he knows Aziraphale will understand it for what it is. Even with the few people he allows to touch him when he's in this shape, he usually doesn't let them readjust him with the ease he lets Aziraphale.]

My eyes aren't ssssoft, they're scary demon eyes. All yellow and snake-y. [He can't huff, so he just sort of bumps against Aziraphale's jaw with his nose, trying to get across the same message.] I'd been sort of expecting a fight, you know, but you were all fussy and nice, had no idea what to do with you.