Crotchet was a mousemaid and, with Queenie and Quaver, was a member of the Melodious Mice, a trio of mouse singers in the Traveling Thistledown Troupe under the leadership of Hypericum Hadduck Hare.
The Melodious Mice opened the performance of the troupe during the Redwall Abbey feast which celebrated the last day of Autumn. The mice were great singers and had performed at many harvest fairs and twice at banquets.