Thebes is a Tertiary Pallasite armed with a giant hammer called the Demon Impact, with which he can summon a meteor. He is prejudiced against Eden for his defection to the Pallasites, even threatening to kill both Koga and Eden with a meteor unless Eden bows before him. Later, during the assault on Pallas’ castle, Thebe decides that he will kill the Saints instead of Hati, with Titan saying both would go. Thebe attacked the Saints from above, where the Pallasite soldiers faced Koga, Ryuho and Haruto, himself fighting Eden again. After a long battle, he decides to use his most powerful attack Gigantic Asteroid to kill everyone, but Eden destroys the attack with his Orions Extermination, and finally kills Thebe as a huge ball of fire smashes down on him.