Biscuit Krueger, known as Bisky, masquerades as a delicate, doll-like girl with blonde hair and pink eyes in some depictions, concealing her true form—a towering, muscular physique she hides out of disdain for its perceived unfemininity. This dual identity aids in disarming adversaries and evading personal insecurities. A seasoned Double-Star Stone Hunter with four decades of expertise, she pursues rare gems like Greed Island’s "Blue Planet." Her martial prowess stems from mastery of Shingen-ryu kung fu, and she mentored influential figures such as Wing. Having passed the Hunter Exam decades ago and later serving as an examiner, she navigates the Hunter Association’s intricacies with seasoned authority. Bisky’s cunning merges with rigorous mentorship. She weaponizes her childlike guise to manipulate targets, oscillating between feigned innocence and explosive rage when provoked about her age or excluded from discussions—often directing wrath at sarcastic pupils like Killua. Her training regimens for Gon and Killua blend brutal physical trials, combat drills, and tailored Nen exercises, forging their aura control through relentless challenges. Her Nen arsenal balances combat and utility. Transmutation alters her appearance and amplifies strength in her true form, while "Magical Spa Services" summons Cookie, a conjured masseuse whose Piano Massage compresses eight hours of rest into thirty minutes via Emission, Manipulation, and Transmutation. In Greed Island, Bisky shifts from testing Gon and Killua’s bond to mentoring them, covertly safeguarding their progress. She dispatches threats like Binolt with calculated ruthlessness and crafts scenarios to sharpen their instincts. Though initially manipulative, she gradually harbors near-parental regard for the duo. During later arcs like the Chimera Ant conflict, she hones their adaptability and precision under pressure, embedding strategic foresight and situational awareness. Combat feats—like one-strike incapacitation of Binolt or exploiting Bara’s weaknesses—highlight her lethal precision. Her hyper-acute perception detects bloodlust from afar, cementing her elite status. Beyond battle, Bisky collects and names rare gems, admires attractive men, and balances her ferocity with whimsical quirks, layering her complex persona.