Only One Can Hear

Don't pay those noises any mind, you're only ｈｅａｒｉｎｇ ｔｈｉｎｇｓ

When only one person has the ability to hear the speech and noises of a non-imaginary creature and when Only One Can See doesn't also apply. This is true for characters with Limited Existences with such cases being their voice can only be heard only by a select few, their speech is heard in the listener's language and another noise to everybody else, they're communicating from another dimension, and so on.