Hailing from the ogre settlements of the far northern Nine Territories of Fire, Haruaki is a rare 3★ warrior-class samurai who wields his blade as his primary weapon. Tradition dictates the clan head must bear two horns for legitimacy. As the eldest child born without these horns, Haruaki faces a predetermined duel against his sister to decide succession. Seeking to escape this fate, he flees his homeland.

During his travels, he encounters and joins the Volunteer Army. In combat, he specializes in dealing significant damage, particularly against ogres. His primary skill, "Blade of Haze," consumes 2 mana to unleash eleven consecutive light-based attacks on a single target, each dealing 1.2x damage. He possesses the ability "Ogre Killer," increasing damage dealt to ogres by 50%. His chain ability "Holly Sprig" (cost: 2 mana) further enhances damage against ogres by 20% while reducing damage taken from them by 10%.

Statistically, he begins at level 1 with 1,370 attack and 1,350 HP. At maximum level (60), his attack reaches 5,800 and his HP reaches 5,750. He follows an average growth curve, requiring 750 base EXP per level.

His resigned outlook is reflected in battle quotes like "Nothing else can be done for it..." and "There's no other option...". During his recruitment quest, the protagonist observes "He's quite good-looking," indicating a degree of observational awareness within the narrative.