Bune is the 26th spirit in the Goetia and is ranked as a duke of Hell. He appears in the form of a dog with three heads: one like a dog, another like a griffin, and the last appears as that of a man. He speaks in a high tone and appealing voice. His office is to change the places of where the dead are buried and has the spirits under his command occupy their sepulchres. He answers the questions of his summoner truthfully and will bestow riches, eloquence, and wisdom upon his summoner if they request it. Bune rules over 30 legions of infernal spirits. Oddly enough, Bune is one of the only Goetic demons with multiple summoning seals.
Bune appears as a boss in Fire Book. A dragon of Niflheim, he is the demon that disguises himself as Enoch after Amphiptere and Shokuryuu imprison the true Enoch. He faces Jin at the pond of Hvergelmir in Niflheim, where he seeks to finish him off. Before dying Bune reveals that Lena will open the way to the world of Legends using her Angel Child powers. The reborn Bune appears in the Expanse Pitfall Forest after completing the main story.