Biscuit (Bisky) introduces herself as a pro Hunter and reveals she was the master of their previous teacher, Wing. She decides to train the boys after realizing they lack the necessary discipline to survive the game.
Gon chooses to prolong the fight to maximize their learning. After ten days, Binolt concedes; Gon’s pure-hearted gratitude toward his would-be killer leads Binolt to peacefully surrender. Hunter X Hunter 2011 Episode 63
In episode 63 of the 2011 anime, titled Gon and Killua officially begin their grueling training under Biscuit Krueger during the Greed Island arc . Summary of Key Events Biscuit (Bisky) introduces herself as a pro Hunter