Wing's impact is so subtle people often overlook it, but he’s basically the gatekeeper for Nen. Without him introducing Gon and Killua to the basic principles, the whole power system would feel like it came out of nowhere. The way he explains aura, Ten, Ren, Zetsu, Hatsu – it’s the foundational textbook everyone uses. But more than that, he sets the moral and practical boundaries. He refuses to teach them the advanced stuff until they’re ready, which is a huge contrast to every other mentor figure who’s like ‘here’s ultimate power, go wild.’ That restraint itself shapes the dynamics; it establishes that Nen isn’t just a cool superpower, it’s a deadly responsibility.
And his influence echoes in their later development. Gon’s Jajanken is a direct, brute-force expression of his Enhancer nature, which fits Wing’s initial assessment perfectly. Killua’s lightning-based transmutation and later his assassin-style application show how he took the basics and twisted them to his background. Wing didn’t give them a unique technique; he gave them the language to create their own. In a series packed with monsters like the Royal Guards and Meruem, that grounding in a rational, teachable system keeps the power scaling from feeling completely absurd. He’s the guy who made the rules understandable so later, when someone breaks them or operates on a whole other level, you can actually grasp the scale of the deviation.
He also represents the ‘civilized’ Nen user world versus the wild, survivalist arena of the Hunter Exam and the outside. His presence in Heaven’s Arena introduces the idea of a structured community around this power, which later ties into the Hunter Association, the Zodiacs, and even the Dark Continent expedition’s logistics. Without that framework, Nen would just be a bunch of random magic tricks. Wing’s the guy who put up the signposts, so when Hisoka starts doing his Bungee Gum thing or Chrollo’s stealing abilities, you have a baseline to measure how terrifying they really are. His legacy is that he made the chaos feel coherent.