Frenn is a fictional character in the fantasy novel trilogy The Echorium Sequence by Katherine Roberts and features in the first and second novels in the trilogy; Song Quest and Crystal Mask. In Song Quest, Frenn is a young novice singer in the final years of The Echorium whereas in Crystal Mask; the story carries on 20 years later, Frenn plays the part of an orderly (one that loses the ability to sing just before becoming a full Singer). He dies from a rockfall in Crystal Mask and therefore is not present in the third novel.