As Gon rests for the upcoming fight , Biscuit approaches Killua .
After sparring with Gon in Killua 's most powerful form , Killua exposes Gon 's own biggest flaw : Killua always fights on the verge of fleeing .
As Gon rests for the upcoming fight , Biscuit approaches Killua and after sparring with him in her most powerful form , she exposes his own biggest flaw : Killua always fights on the verge of fleeing .