Aziraphale frowns sharply at Illyria's pronouncement. He doesn't like it one bit that she can hear the cordyceps - that they 'sing', apparently. He doesn't like that Melanie will have to talk about them. He has to stay out of it, he thinks, to let Melanie handle this as she wishes, but - he levels a glare at the back of Illyria's head, watching her carefully. If she asks anything that makes Melanie uncomfortable he is going to be put a stop to this at once.