月城 銀河

Shou's, the MC's, brother, the Student Council President and last year's Altair. He himself says he's always watching Shou from the shadows. While Ginga is the Student Council President, he was hated by almost all of the male students in the academy for being the Altair last year. Thus, Ginga created himself a fake personality, but in reality he looks down on everybody.
Ginga was the one who made Shou to be this year's Altair. In fact, it was to stop their father, who is the Headmaster, from his evil plans. He trusts Shou whole-heartedly, and thus, used his power to have the special ring to be given to him.