The characters Ai Hayakawa and Yu Hayakawa first sought out the Interdimensional Train as a means to travel to Wonderland, having read an online rumor about a train that appears at an abandoned subway platform at 13 seconds past 12:13 A.M. on the night of a full moon. On board the train, they also met Lisa Pacifist, who was traveling to Wonderland for her own unstated reasons. Throughout the the first 14 episodes of the series, they, later joined by Chobi, used the train to travel to various locations throughout Wonderland. Other characters to ride the train in the series included Kaze and Lou Lupus.