Jack: He is eight and a half years old and he doesn't like make believe.

Annie: A seven-year-old girl who likes pretend stuff. She is the sister of Jack.

Captain Bones: He is the biggest pirate among the three who caught Jack and Annie on the shore. He orders the other pirates, Pinky and Stinky, to find treasures for him.

Morgan le Fay: She is the "M person" according to Jack and Annie. Sister of King Arthur, Morgan came from Camelot to the 20th Century to collect books. She put a spell on the tree house.