Canticle is one of many slaves found in the Cloakwood Mines during Baldur's Gate. He claims to have been a bard once, but the harsh conditions of the mine have ruined his lungs and his voice.

Like most slaves in the area, he merely serves to help reinforce the setting and their predicament; in Canticle's case, his dialogue reinforces Gorion's Ward likely target - Davaeorn - while making the point that there's even more to be investigated.

I was a bard, once. I knew every song that ever was and I could sing them all so beautifully. But now my throat's been choked by dust and my lungs have withered in this chilly air. A thousand curses on Davaeorn and whatever man it was that hired him!