Celestial Retreat Star, Genbu Gregor is a gigantic Specter who claimed that his Surplice was harder than diamond.
Genbu can refer to black tortoise a Chinese constellation symbol. It is sometimes called the Black Warrior of the North, is known as Genbu in Japan,
Korea and Vietnam. It represents the north and the winter season. It is translated into English as Black Turtle.
Although Genbu told El Cid that his Surplice was harder than diamond, the Capricorn Gold Saint cut it in two easily with his sacred sword Excalibur,
instantly killing Genbu.
When El Cid went off on a mission to search of the Gods of Dreams in order to rescue the soul of his fellow Sisyphus, he was attacked by a group of Specters, which he defeated easily. Then Genbu Gregor appeared and faced the Capricorn Saint, recognizing him by his reputation as a Saint who trains constantly to improve his blade. After ensuring that the art of the Gold Saint was no match for the diamond hardness of his Genbu Surplice, Gregor launched himself against El Cid in a rolling attack. The Capricorn Saint quickly split him half with a wave of his hand, killing him.