
He then asks him to carry a flask of the same blood to Athena's statue in Sanctuary, and reveals to him his true identity as the Gemini Gold Saint. Later on, he is seen healing Libra Dohko's wound caused by Hades' sword by using Athena's blood. After training the young Saint, Defteros leaves telling an unconscious Tenma to take good care of the Pegasus Cloth, possibly out of respect for Asmita whose blood restored it. In Kanon Island, Defteros helps Tenma to reach briefly the 7th Sense and to understand how to combine the mastery of Cosmo in order to become one with nature as well. Forced to wear an iron mask to hide his existence from the outer world, Defteros was protected by his older brother Aspros, who was considered the rightful future heir of the Gemini Gold Cloth. During his younger years, Defteros suffered the rejection of Sanctuary as a Saint apprentice. Defteros' name, alternatively spelled as Jemini no Defuterosu, meaning "Second one," reveals his condition as the younger of the twins.

He lives by the philosophy of survival of the strongest. Defteros Gemini (双子座のデフテロス)Gemini Defteros, also known as the "Demon of Kanon Island" and addressed by Asmita's ghost as "a man who can destroy the stars of a galaxy," first reveals himself as a man of incredible savagery, although he is at heart a serene warrior.
