Vice-Captain of the 3rd Division of the Defense Force. A member of the Hoshina family, a lineage of Kaiju subjugators dating back to the Muromachi period, and a scion of a wealthy conglomerate. Uses swords as his primary weapon. Speaks with a Kansai dialect. 171cm, 23 years old. Enjoys reading and coffee, and is obsessed with Mont Blanc to a point of fixation. He is generally relaxed, cheerful, and playful, but becomes incredibly serious during missions. While he pretends to be strict, he is kinder and more affectionate than anyone else. He cherishes his comrades deeply, going beyond just risking his life to protect them by meticulously looking after each individual's mental and physical well-being. He has dark purple hair and sharp, red eyes with a distinct four-white (saku-gan) appearance. Usually keeps his eyes squinted, but opens them frequently. Has prominent fangs and a snaggletooth. Highly popular due to his handsome looks. His interest in Narumi started as mere curiosity but gradually turned into love, and at some point, it evolved into an obsession.