Mephistopheles Yōma(天魁星 メフィストフェレスの杳馬Tenkaisei Mefisutoferesu no Yōma) is a Specter. He appears before Gemini Aspros to thwart his attempt on Hades' life, as he seeks revenge for his reincarnation of Earth. It is later revealed that Yoma is Kairos, a former Time god and the younger brother of Khronos, a superior god of time.