User blog comment:DinoTaur/What a Hatsu Can Tell Us About a Character/@comment-5780397-20160316121407

It's so similar to psychoanalitic theory! Of course take all of this with a pinch of salt.

Hisoka

Bungee Gum is a perfect reflection of Hisoka's relationships, which are a form of one-sided interest that the target has no way of freeing himself (generally) from. Conversely, Hisoka can decide to rescind that type of bond whenever he wants. As for Deceitful Texture... I guess it is more of a complementary Hatsu that supports Bungee Gum? Of course, both are tied to his love for candies. It is actually very curious that someone who allegedly "has no interest in the past" named his abilities after products from his childhood.

Killua

As you said, resistance to electricity is a kind of legacy for him from his family. That he chose to exploit it in his Hatsu means that he has reached some kind of emotional balance, perhaps forgiving his family after the Zoldyck arc.

Genthru

Countodwn matches Genthru's idea of "lucid madness" ("...how calm yet crazy you are"). It is centered on a bomb, an intellectual object (in that it is artificial) that requires a lot of care and effort to be created and whose purpose is to kill someone. Little Flower was implied (or even stated) to have been born to protect Genthru from those who want to deactivate Countdown.

Chrollo

I wonder if he has been stealing since he was a kid. I'm not sure how private property is intended in Meteor City. Perhaps they keep what they find in the garbage? Anyway, I don't know about the HxH world, but the Bible is one of the foundations of the Western world. Seeing his actions, that he turns it against itself may mean he completeky rejects society and encourages other (his group, his 12 disciples) to leave without morality and only through their strengths. Stealing is an act of prevarication. As pointed out by Alex, Indoor Fish is a way of killing that shows total disregard for human life.

Feitan

We know Feitan is a sadist. I think he could also be a masochist, have a death wish, or on the contrary have a childish God complex, where he can hurt others without them hurting him back, so he could possibly detest being damaged (see also when Chrollo was abducted: he cared more about punishing the one who did it than getting their leader back). His ability is apparently very painful for the target, in accordance with his sadistic tendencies, and, depending on what you believe, either makes them suffer while Feitan watches, unhurt and unreachable (scopophilia), or "punishes" the ones who hurt Feitan.

Gon

Biscuit said it: Gon's imagination is that of a child, his three Hatsu abilities are, in name and concept, those you would expect from a kid. However, the long time they need to charge reflect Gon's headstrong behaviour and his lack of concern for his own well-being, which borders on the death wish, not to mention of course his resolution to become stronger. As for his transformation, everything was explained.

Biscuit

This is the one I am sure about the least, but we know Biscuit hates being called "old", and, in turn, old age. An aspect of old age are physical ailments; Cookie may be meant to cancel them. Or it could be a sort of "maternal" ability to support her students. Meh.