...I have no idea what gay space rocks smell like. She possibly doesn't have a scent at all, actually, considering that her body is basically just a projection. (Unless he can spell her gemstone? Do pearls have any kind of scent?)

As for Matthew, I don't think the Blue Electric Angels (aka the telephone spirits) would be noticeable in Matthew's scent generally, although Laughs might be able to pick something up from his blood, if he was bleeding.