User blog comment:Kevo411/HxH Questions 2/@comment-48285-20140615050523

1- It's like Palm said, adding humans into the mix (as in, the Queen eating humans) complicates things. They have that human doubt and think that Komugi is a threat.

2- Gon grew up on an island. Kalluto (who's a boy, by the way) didn't. Plus, Hisoka was focused on something else so his senses weren't working properly.

3- Hisoka transmutes his aura. To have a conjuration ability, you have to actually conjure something. For example, Kurapika conjures his chains. The chains he conjures become physical. With Hisoka's abilities, he attaches his aura to whatever.

4-Nobody really knew who the members of the PHantom Troupe are/were. It's not like there's a website that has all the information on the Phantom Troupe out there so Kurapika couldn't have done research. There wasn't a need for Hanzo to learn about Nen because he's a ninja. Ninja have their own ways. As for Killua, I'm not entirely sure. It could be that he was going to learn about Nen at some point, possibly soon, if he hadn't run away. It'd be more clear if we knew what happened at the Zoldyck house between when Killua left with Gon and co. and the time when Kalluto reappeared as a member of the Phantom Troupe.