User blog comment:Pigzillion/How come Killua learnt Nen so late?/@comment-4828844-20150809015327/@comment-25814498-20150809022344

Still, it's pretty amazing that it took Killua somewhere around a year to "master"(though not really) nen, when Kalluto can do it in a few months to the point where he's so good he can join the phantom troupe. And since I'm not one to skip on a good image I've used before: