Why does Wing regret teaching Gon and Killua nen? Ok, let me specify. The first time I watched the 2011 anime, Wing said that he was having a bad feeling about teaching Gon and Killua nen, and would later say more about how he regrets teaching them nen. I didn't understand why tho. Then, while watching the 1999 adaptation, Wing said the same thing and I still don't really get it lol. I might just be stupid, but yea I need some help with this.