Who is Amania, Audiva, Pona, and Briala from Dragonsinger and what is their importance?

Amania, Audiva, Pona, and Briala live at Harpers Craft Hall. They are not apprentices and are there to study the musical basics necessary to entertain their families. Pona, the leader among the girls, is extremely jealous of and antagonistic toward Menolly.