Wing

As a skilled Nen instructor and former pupil of Biscuit Kruger, this mentor serves as a vital guide for Zushi, Gon, and Killua. Though initially hesitant to teach the young duo and even deceptive about the nature of Nen, his conscience compels him to provide essential training once they reach the Celestial Tower's 200th floor. After months of rigorous instruction in fundamental techniques, he eventually recognizes their mastery, officially certifying them as successful Hunters.