Enzo tries to get a better whiff without actually leaning over and sniffing the guy. He knows that can be off-putting.

"You smell like... like the hallway outside the Core room," he says slowly. "Like a whole lot of raw energy, but it's on the other side of a door. A really thick, secure door."

It's a rather specific smell, but one you remember if you've been there. (Bob even showed him the Core itself once, just for a moment and with a great deal of shielding.)