"Oh, that's helpful," he says as Jaeger offers more details. "I don't know what psychology is."

It's obvious Jaeger is well-educated, though, and as long as no one is wielding their knowledge to be an unrepentant asshole, Caduceus generally respects learned people.

As they cross onto ADI property, Caduceus's appearance... starts to change. The first thing Jaeger might notice is the height. It becomes apparent that Caduceus is, in fact, just about seven feet tall. The human visage melts away, revealing the firbolg he really is, tail and all.