Haidi wisely did not press further.
She knew that she and Fenna were different; although she was nominally a "clergy" with accreditation from the Academy of Truth, she was better at pure research and contemplation rather than directly confronting those dangerous, secretive forces. Indeed, she could pry secrets from the minds of heretics and tease out the heretical shadows left behind by mass hallucinations, but this was starkly different from the work of a Judge.
She herself lacked sensitivity to certain threats.
But Fenna was someone who had been confronting heretics and secret forces head-on for years, and she might have already keenly sensed the presence of some shadow—today's visit to the Lower City District probably inadvertently disturbed something.
As they were getting close to home, Haidi asked a question, "Is there a problem with that antique shop?"