Ru Cain

Admiral Gresco's son, introduced in the second arc, Eiji's rival, and the main villain of the series. Appointed to Supreme Commander of Earth, he is ruthless and arrogant, believing in the ethnic superiority of the Gradosians. Although he tries to execute Julia for treason, he finds himself unable as he is strangely attracted to her spirtual force. He is determined to rule Earth and crush all resistance, but refuses to fight unfairly since he considers himself nobility.