Elemental Beasts are monsters from Grandia Xtreme which have been created within the Elemental Ruins.
The Elemental Beasts were prototypes of the Quanlee project, created from the power of the Spirits' energy, drawn into the individual Elemental Ruins. Most of the Elemental Beasts, found in the Spiritual Atriums of the ruins, died before the events of the story, and only remain as dessicated corpses.
The only known Elemental Beast alive during the events of the game is Zenothlee, created by the Atrium of the Darkness Ruins.