As the world was sealed and fragmented, the Water Spirit assisted the Hero at various stages of his quest to reclaim each land from the Demon Lord Orgodemir. This included enabling him to decipher the ancient language of the Roamers and helping him and his companions breathe underwater to defeat Gracos.
Arus experiences multiple visions from the Water Spirit, guiding him to the discovery of the first stone tablet fragment.
(Source: Dragon Quest Fandom Wiki)










