The girls are visited by Liko's archaeologist father, Lien, who had learned from the Headmaster about their identity as Pretty Cures. As Lien looks into the mysteries behind the spirits and the Diamond Linkle Stones, Liko feels downhearted as she believes her father is more interested in his work than spending time with her. While Mirai tells Liko about how much parents worry about their children, Mirai's father tells Lien about how strong children can grow. Just then, Benigio appears and summons a Water Don-Yokubal, injuring Lien when he steps in to protect Liko. After the Cures defeat the Don-Yokubal, Lien tells Liko that the spirits most likely relate to the girls' emotions, promising to come see her again, while another spirit joins the Rainbow Carriage.