Caveside Girls are the prehistoric ancestors of the Fireside Girls in "Tri-Stone Area".
They are a group of girls, probably lead by Isabelock. After Can-tok discovered fire, they joined the cast in performing a cave version of a popular summer song
They look like their modern day descendants, but Gretchen hasn't got glasses in this version. And Adyson doesn't have her headband. They are dressed with animal fur.