Haraguchi self-describes as "a nerd first and an activist second". Although he is fully committed to the cause of the [[Youkai Nation]], he prefers to serve its interests from the background, ensuring that the systems and infrastructure that youkai activists use are in good order.
He is frequently described by friends and colleagues as a gentle, soft-spoken, friendly figure with vast, expansive knowledge in all sorts of domains, from gunsmithing to computer networking. Though he has no qualms with producing and customizing weapons to his friends and his activists - he has, in fact, personally built maintains and customized customizes all of the Task Force's weapons - Haraguchi describes himself as a pacifist. He has never shot a sapient person in his life, and he dislikes traveling in the UA even within the Youkai Nation, stating that it often means having to shoot at living creatures.
His favorite restaurant is ''Great Tengu Inn'', one of Yurai's izakaya. Haraguchi considers it the best izakaya in the town, and perhaps even the best restaurant in the world.