The character Yggdrasill's name is taken from Norse Mythology. According to the Norse, the Yggdrasill was the giant ash tree which connected the three worlds, Asgard (land of the gods), Midgard (land of the mortals), and Niflheim (the underworld). In the game, the giant Kharlan tree has a similar function, being a "link that connects the world." Furthermore, an identical tree appears in the series's first game, Tales of Phantasia, under the name "Yggdrasill."