Killua is in love with Gon. Reminder:
>Togashi previously wanted to write a sports shonen with a canon gay crossdressing boy as the protagonist, but Shueisha shut him down.
>Togashi would then go on to write Yu Yu Hakusho, which literally saved Shueisha from bankruptcy.
>as thanks, and because Togashi had worked himself halfway to death, Shueisha allows Togashi free rein to do whatever he wants with Hunter x Hunter (hence his erratic schedules that would get any other author fired).
>Togashi has full ownership over Hunter x Hunter, giving him absolute control over the story.
>now that he has so much power, Togashi plans on getting revenge on Shueisha for canning his gay sports manga all those decades ago by making Killua gay and they can’t stop him.
Further reasons:
>in chapter 286 (episode 122), Killua literally says he and Gon will commit "shinju," otherwise known as "lover's suicide" — a term that has only ever been used romantically in Japanese literature.
>Togashi clearly has an interest in the "weird," as seen with Hisoka and Alluka.
>Togashi is married to Takeuchi, author of Sailor Moon — a series that features canonical lesbians. In addition to this point, the current Hunter x Hunter arc features a lesbian kiss between Morena and one of her followers.
>Yu Yu Hakusho has a gay couple: Sensui and Itsuki, showing that Togashi is willing to include gay characters and relationships in his stories.
>everything Togashi does is for a reason. When he includes scenes such as Killua's "Gon, you are light" and "shinju,” he knows how fans will interpret them. To say otherwise implies he’s out of touch.
>to claim this is all bait is to insult Togashi, because that implies he's a hack who has to resort to the lowest form of writing: pandering. He is not that desperate.
>as seen in chapter 323 (episode 139), even Hisoka thinks Killua’s most “beloved” is Gon.
And the main reason:
>Togashi is a mad man.
