They meet him in a cathedral. And he’s a bard. And he wears a chain shirt. And he uses a rapier. And he owns a magical music box. Yuck!
If I ever run this adventure, the guy can stay as a bard, but he’ll have some custom spells (bestow curse, insect plague, entangle – and the “cathedral” will be a cave overrun with tree roots, so he can use entangle) to give him a completely different feel. The rapier is gone (he uses a staff or something) and the music box is a drum made from human skin that beats out a rhythm by itself.
The music box artefact effectively has no role to play here, which is a shame.