Ex-mortal or not, from where Irori truly stands far above Golarion and other places, it isn't easy for Him to look inside the mind of a mortal not pledged to Himself. Otolmens only needs to pay attention to relatively few things going on, inside the multiverse, and then she is a relatively physical-focused entity on top of that, designed to be able to check all the electrons in a room to make sure none of them have the wrong mass. Irori, if He hasn't formed an avatar and sent it into the room, cannot read the writing on the whiteboard the way Otolmens can; he can barely tell that these souls are in a library surrounded by books. He definitely can't hear the sounds, the pressure patterns transmitted through the air as vibrations.
Still, it is Otolmens who calls, and the mortal is more Lawful Neutral than usual even for those that register Lawful Neutral.
Irori takes a very brief look at the surface of the mortal's mind.
...he's not planning to destroy mathematics. He only intends to teach of his Way to others.