Inspired by Caduceus being super focused on their surroundings in Dashila's lair. (You messed up a perfectly chill Firbolg, is what you did. Look at him. He has anxiety.)

Caduceus gets into the habit of constantly trying to perceive their surroundings even when there's no apparent danger because the group tends to depend on him for it, he's often holding a cantrip ready for anything to jump out. He's so ready for danger he can barely make conversation. Has to cast calm emotions to get any rest.
Its exhausting, and it takes the Nein a while to notice, but something happens and they do.

Someone please Hurt/Comfort the nervous Cleric.