Naoto is the main protagonist of the novel series, Bloodedge Experience. He is from an alternate timeline than the main games and is gifted with the Hunter's Eye, which allows him to see the 'life-force' value of others. Much like Ragna, he becomes a servant to a vampire named Raquel Alucard, who seems to be the Rachel Alucard of his world. His life-force value hovered around 9,810 until he became Raquel's servant. In Central Fiction, Naoto is searching for Raquel, who mysteriously disappeared, and made his way into the main timeline. As revealed by Relius, Naoto did at one point exist in the main timeline, but has been long dead after Clavis Alucard killed him. When he talks to Raquel through Rachel, he is tasked by his mistress to save the world he's currently in, as their world is connected and is in danger of disappearing due to the problems in the main timeline. His sister, Saya Terumi, is hinted to be the basis for the 5th Prime Field Device, potentially making him the uncle of Ragna, Jin and Noel/Saya. After helping Ragna calm down at a point in the story where he almost lost himself to rage, Naoto's purpose in the main timeline is fulfilled and he is sent to his own timeline, where he reunites with Raquel. With his Drive, Bloodedge, Naoto creates iron objects from blood. His brown eyes turn red and his brown hair turns white through heavy usage, making him heavily resemble Ragna.