Look at him being completely harmless and normal and realize that it's Emet's student who is unhinged.

"I don't know if there's anything we can do," he admits. "There have been reports of the townspeople recovering since our arrival, but nothing was actively done to them."

It's then that he fixes Emet with a hard to read stare, though doubt still lurks in his eyes. "Are you actually here because you want to cure these people?" Dokja himself has yet to say if those are his intentions as well.