Mount Etna otherworldly associations of the great, volcanic mountain of their new home. Mediaevalist Roger Sherman Loomis quotes passages from the works of Gervase of Tilbury and Caesarius of Heisterbach (dating from the late twelfth century) featuring accounts of Arthur's returning of a lost horse which had strayed into his subterranean kingdom beneath Etna. Caesarius quotes as his authority for the story a certain canon Godescalcus of Bonn, who considered it a matter of historic fact of the time of Emperor Henry's conquest of Sicily "circa" 1194. Caesarius employs in his account the Latin phrase "in monte Gyber" ("within Etna") to describe
Etna (Disgaea) then on, Etna becomes Laharl's closest vassal, though not necessarily most trustworthy vassal, aiding him in his rise to power. She is the only vassal from Laharl's original servants who goes out on the battlefield for him. Etna often acts carefree and tends to be rather snarky towards Laharl and Flonne, but is also very devious and underhanded. Often it is hard to tell for whom she really is working. She holds deep respect and loyalty towards King Krichevskoy, Laharl's father. When it comes to her Prinnies, however, she tends to be rather abusive towards them, especially in later games.