[Well, it's accurate to the situation. But of course it'd sound weird to someone who couldn't hear what she's hearing. She doesn't want him to think she's crazy, though... she sighs and tries to explain.]

Look, it started when they brought in the Dementor. It's probably using some kind of psychic or ghost ability. Maybe you're type resistant to it.

[...yeah, she thinks he's a pokemon, sorry.]