Mingyu is uniquely equipped to interrogate people in general due to the nature of his lotus tattoo, and if he feels no one else is up to it/the person volunteering to do the interrogation is not as competent as he, will take up the grim task and have no qualms about Wangji putting them down after.

I am brain dead after family and family drama and would love everyone to pool together to help me figure out what answers to pry out of them, however.