Why did Gon and Killua break up in "Hunter Hunter"?

Because of Kate's death, Gon blamed himself for his incompetence, and Killua was also to blame. Because of his subconscious misjudgment, Killua's psychological defense collapsed. He knocked Gon out and ran away with him, leaving Kate to face Catwoman alone.

Besides, although Alluka is a family member of the enemy, no one except Killua regards her as a family member. Because of his sister Alluka, Killua has to promise to take care of her for the rest of his life. Therefore, he was destined to part ways with Xiaojie in the end.

Life experience

It was Mitte and her grandmother who raised Xiaojie. Mitte is Xiaojie's aunt and Jin's cousin. She raised Xiaojie like a mother. Run a small hotel on Whale Island. Wrest Xiaojie's custody rights from Jin in court. The ideal mother that Killua longs for. There are many unclear points about Xiaojie's life experience. It was Jin who brought Xiaojie back during the trip, but Jin only said that he and Xiaojie's mother were separated and refused to elaborate. And Kim’s wife remains unknown.

Weapon

Xiaojie’s weapon is very special, it is a telescopic fishing rod. This fishing rod was a prop commonly used by Jin when he was young, and Xiaojie used it as a weapon and survival tool (fishing, hooking things, etc.). In the first episode, Xiaojie used this fishing rod to catch the fast-moving fish in the swamp. Although it cannot deliver a fatal blow to the enemy, Gon can use it to accurately hit or hook the target. Weapons commonly used in the early stages of the hunter story are rarely used in the later stages (Greed Island Chapter, Chimera Ant Chapter).