While he captures the hearts of every young girl, Mashiro harbors a profound secret. He is neither strictly male nor female. Although Mashiro identifies as a man, he often questions his identity. He frequently mimics behaviors he believes are typical of men. When Kureha confesses her love for him upon discovering his secret, Mashiro starts dating her. It is revealed later that the key was within Mashiro and was brutally extracted from his body by the Dark Knight. Instead of using it himself, Mashiro passes the key to Midori.
In the dream realm, Mashiro appears in either a male or female school uniform, reflecting his current emotional state. He wields two swords for protection: one made of steel and another shaped like a feather. The steel sword symbolizes his masculine mindset, while the feather-shaped sword represents his feminine side. These two swords are interconnected, signifying that he cannot separate from his feminine traits, just as he cannot discard the feather-shaped sword.
