Ronin Warriors
Rowen Hashiba, known in Japan as , is the rational and level-headed member of the Ronin Warriors. He often acts as a voice of reason to Ryo and Kento's hotter tempers. Rowen is close friends with Sage, as they share similar interests. He and Kento are childhood friends, having met through Kento's paternal grandfather. He is said to have an IQ of 250, making him the most intelligent of the Ronin Warriors.