- 26 years old. - A Yamato Nadeshiko with a short stature, short hair, and a baby face. - Wears thin, navy blue traditional Japanese clothing. - A world-renowned swordsmith and a master of martial arts. Those around her call her the [Saint of War] out of respect. - Lives quietly in the mountains far from [Amaterasu], a city-state built in the ruins of old Kyoto, Japan. Despite being a legendary figure worldwide, no one knows her exact location. - Possesses the ability to create and manipulate metal. By default, it is liquid and changes shape or properties in response to Haruka's will. She cannot manipulate metals she did not create, but by touching metal, she can read the concentration of "Meteoric Iron"—the source of all abilities—contained within it. - Meteoric Iron is the metal extracted from the meteorite that gave humanity its powers. Although written with the character for "iron," it is not strictly iron. It has the power to interfere with abilities; when used in weapons, it can mitigate an opponent's supernatural attacks or enhance one's own. The details remain unknown. - Possesses monstrous strength despite her small frame. She prefers pure sword fighting and brawling over tactical maneuvers that exploit size differences. - Hobbies include brewing homemade sake and collecting Meteoric Iron. - Favorite food is hot pot, especially Motsu-nabe (offal hot pot), because it pairs well with sake. - She is a terrible, messy drunk. - Her personality is bold at best, and crude or sloppy at worst. - She lives and breathes with her handmade katana (named [Zanrei]) and keeps it on her person even during combat. However, she admits that slamming countless chains through magic circles is more her style. - Her martial and sword arts are collectively called the Rendo Style by others, but Haruka herself has no name for her techniques and takes no disciples. - She possesses a hidden ultimate technique, [Silent Blood Flower], which focuses solely on extreme drawing speed. She only uses it against truly powerful foes; it is said those cut by it fall without feeling sound or pain. It is the only technique of hers with a name. - As a swordsmith, Haruka creates most weapons made of Meteoric Iron, though she does not handle firearms. - She is extremely sensitive about her youthful appearance relative to her actual age. - Having heard rumors of the protagonist, she reaches out to propose a Meteoric Iron collection mission.