  He Ex-naval officer and half-American half japanese. Rio speaks and behave like a soldier. His hobby is cooking food that serves a practical purpose so the ingredients were mostly unusual like insects, and wild animals. He calm, but also a bit stiff and thick-headed. Not used to civilian life,  prefers to live in the woods with my tent. shown to be kind and selfless, being always ready to treat anyone to cooking. obedient and loyal to comrade. one of Mad Trigger Crew's member.