User blog comment:- Darkchylde/Belated happy birthday, Killua!/@comment-5780397-20150717130458/@comment-4828844-20150717131606

Here's something to satisfy your curiosity:

http://i1052.photobucket.com/albums/s449/D-Chylde/tumblr_mv731zLE2b1sja9bto1_500_zpszsku3ezo.jpg

A fan art yes, but goodness me! They both look pretty handsome here. If Togashi extends the series until Gon and Killua are teenagers, I am sure fangirls all over the world would nosebleed.

For now, I guess we're stuck with Hisoka's fanservice. Not that I'm complaining...

http://i1052.photobucket.com/albums/s449/D-Chylde/tumblr_m5qq087JdA1rytj8fo1_1280_zpstoq3yhrn.jpg