Kuroro & Hisoka
Kuroro (Left) is the leader of the Spiders, he uses his nen and hands to steal other people's ability and records it down in his book and takes out skills from his book...

Hisoka (Right) is like a clown, but a very cold-blooded guy which likes to play games and mad! Hes a friend of Killua's brother..(which is another mad guy...).