As naughty as Thelma was in Book Two, she redeems herself in Book Three. She admits to Cory Crow that she was unkind to him and apologizes. Cory graciously accepts her apology and they become fast friends. Cory said, "So now we are five. Five best friends."
Thelma and her friends, Beetle, Bunny, Cory Crow and Adam Mouse, meet Rudy Raccoon. However, the initial meeting is not a happy one.