Hakufu Sonsaku, born March 17 under Pisces, is a 17-year-old female student with a striking physique (93-56-88, 162 cm tall), strawberry blonde hair, and vivid green eyes. She dons Nanyo Academy’s uniform: a red plaid skirt, yellow sweater vest, and brown loafers. Her exuberant nature intertwines with childlike naivety, fueling a passion for combat and spurring impulsive choices, though she staunchly rejects lethal force. Raised in isolation outside Kanto by her mother Goei, she trained in martial arts, tea ceremonies, and flower arranging to evade her prophesied destiny as a conqueror. Relocating to Tokyo after defeating a wandering fighter, she joined Nanyo Academy, swiftly proving her latent combat mastery. Though classified as a D-rank fighter (silver magatama), her true power peaks at A-rank (golden magatama), briefly surging to "Special S-rank" when activating Suiryuuken—a Water Dragon (Suiryuu)-linked technique. Her chi-based arsenal includes predicting opponents’ movements, delayed energy strikes, and inner chi manipulation, enhanced by inherited chi magic knowledge from Master Chosho, absorbed spiritually during unconsciousness. Her journey unfolds across pivotal arcs, beginning with clashes against Nanyo’s Big Four, including Kannei and Ryomou. A near-fatal duel with Ryomou unleashed her berserk dragon-driven state, a recurring theme in battles against Shigi Taishiji and Yoshu Academy rivals, highlighting her ferocity under duress. Reluctantly embracing leadership after absorbing corrupt chi from her cousin Koukin—marked by a creeping skull-shaped taint—she grappled with escalating responsibilities. Later confrontations, such as with Sousou, saw her dragon’s influence consume her, leading to apparent demise in a climactic duel. Resurrected via sacrifices by Ukitsu and Chokou, she harnessed full dragon control, embodying tempered resilience. By *Great Guardians*, she resisted Genpou Saji’s illusions and shouldered leadership with newfound resolve, balancing earnest duty with her trademark airheadedness. Relationships, including simmering romantic tension with Koukin and bonds with allies like Ryomou, anchored her growth, underscoring loyalty and self-discovery. Her evolution retains core traits—unbridled combat zeal and playful naivety—while weaving maturity, seen in post-battle endeavors like fundraising at a cosplay cafe for a "battle tour" and battling Koukin’s lingering corrupt chi. Despite occasional lapses into comedic mishaps, her narrative cements her as a tenacious protector, blending unyielding principles with raw, evolving strength.