Panic spikes as he realizes that Inej might actually be able to hear the whispers too. Until now, nobody else has reacted to their barbs — he assumed it was his own brain trying to cannibalize him. Wilhelm plays it off as if he's just as surprised by the sourceless voice, and tries to focus on...anything but that.

The pattern of their footsteps, for one thing, as they start down the corridor. Except hers are silent while his tentatively tap along, just as lost as the rest of him.

"I tried before, but...it didn't work."

He leaves her to think that it could have something to do with the idiosyncrasies of the Horizon.

What are you afraid of burning down this time? the voice probes. His shoulders tense like walls raised in defense.