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 tent. Intrusive, possessive, jealous, loving, sociopath. But he is ready to kill those who even somehow flirt with his soulmate.