History Heartwarming / HunterXHunter

** Gon thanks Killua for "everything" and Killua decides to troll Gon just once before leaving, by saying how worried he was about Gon trying to fight Pitou alone, and how much trouble Gon caused him. Gon collapses in comical blue-streaks, Alluka snaps at Killua, and he responds with a CatSmile. It's great low key kid-like humor, how they how make light of one of the most intense moments of their adventure.

** Gon thanks Killua for "everything" and Killua decides to troll Gon just once before leaving, by saying how worried he was about Gon trying to fight Pitou alone, and how much trouble Gon caused him. Gon collapses in comical blue-streaks, Alluka snaps at Killua, and Killua responds with a CatSmile. It's great low key kid-like humor, how they how make light of one of the most intense moments of their adventure.

*** HeartwarmingInHindsight-- Gon had been saying the entire arc that he had a gut feeling that Kite was still alive. Well, he's right... [[{{Reincarnation}} sort of]].

* Killua vowing to protect not only his little sister Alluka, but also Nanika, her wish-granting alter ego. Especially since this was seconds after [[KickTheDog Killua told her to never come out, and reduced the poor thing to tears.]] After being [[WhatTheHellHero called out on this]] by Alluka, Killua tells Nanika he was wrong and he'll always protect both of them, before tearfully asking for her forgiveness. She forgives him.

* Meruem, while having an inner monologue on how sociopathic he is, was about to kill Komugi, but he then sees her being attacked by a hawk. He kills it and asks why she didn't ask for help, she answers she didn't want to bother anyone. It serves as heartwarming development of character for someone had previously being perceived as a complete psycho.

* Killua vowing to protect not only his little sister Alluka, but also Nanika, her wish-granting alter ego. Especially since this was seconds after [[TearJerker Killua told her to never come out, and reduced the poor thing to tears.]] After being [[WhatTheHellHero called out on this]] by Alluka, Killua tells Nanika he was wrong and he'll always protect both of them, before tearfully asking for her forgiveness. She forgives him.

** Their last moments together. Mereum went from someone who wanted to take over the world to someone who just wanted to spend the last few hours of his life playing a board game with someone he had come to care deeply about. When he tells Komugi the poison is contagious, she tells him she won't leave his side and holds his hand when he starts to lose consciousness, thinking she'll be joining him soon.
--> '''Komugi:''' Goodnight, Mereum.

** From the same arc, we get to meet [[LittleMissBadass Canary]], one of the Zoldyk butlers. The narrative takes its time noting that she sincerely wished to be friends with Killua even at an early age, but could not because the Zoldycks forbade real social interaction with him. So when he finally leaves the butler's quarters and passes her up without saying a word, it's a [[TearJerker little hard to watch]]. But when Gon, who barely knew her but still saw her need to help Killua, cheerily says goodbye to her on his way out, it's the [[WhenSheSmiles small smile on her face]] that she makes as Gon passes her by that makes it all worth it.

* Mereum, while having an inner monologue on how sociopathic he is, was about to kill Komugi, but he then sees her being attacked by a hawk. He kills it and asks why she didn't ask for help, she answers she didn't want to bother anyone. It serves as heartwarming development of character for someone had previously being perceived as a complete psycho.

* Gon and Ging's conversation atop the World Tree. When he tells Gon about his ambitions, he basically tells him that keeps losing sight of his ultimate goal because he's more interested in [[ItsTheJourneyThatCounts the faces of his colleagues as the journey's being completed.]] In the 2011 anime its especially poignant because the show cycles through the faces of his [[TrueCompanions dearest friends throughout the series]], and ends with [[WhereAreTheyNowEpilogue where they all ended up after the previous two arcs]] (Chimera Ant and Chairman Election).

* "Gon....you are light."

* Ging reassuring Gon that he doesn't need to shoulder ''all'' of the blame for the events that transpired during the Chimera Ant arc. In addition, he basically tells Gon that Kite wouldn't have taken him along with him if he didn't think he was capable enough. When Ging [[ParentalNeglect wants]] to be a dad, [[JerkWithAHeartOfGold he can be a dad.]]

* In the manga, when Gon is listening to the message Ging left for him and the recording says that if he keeps listening Ging will tell him about his biological mother, Gon shuts off the tape without a second of hesitation, knowing that the moment he shuts the tape off it will automatically erase itself. When Killua asks him why, Gon tells him that he doesn't care about who his biological mother may be, because in all other respects his real mother is Mito (and unbeknownst to him, Mito is listening in and hears this).

* Chapter 339.
** In the manga, when Gon is listening to the message Ging left for him and the recording says that if he keeps listening Ging will tell him about his biological mother, Gon shuts off the tape without a second of hesitation, knowing that the moment he shuts the tape off it will automatically erase itself. When Killua asks him why, Gon tells him that he doesn't care about who his biological mother may be, because in all other respects his real mother is Mito (and unbeknownst to him, Mito is listening in and hears this).

* Chapter 339. That is all.
** In the manga, when Gon is listening to the message Ging left for him and the recording says that if he keeps listening Ging will tell him about his biological mother, and Gon shuts off the tape without a second of hesitation, knowing that the moment he shuts the tape off it will automatically erase itself. When Killua asks him why, Gon tells him that he doesn't care about who his biological mother may be, because in all other respects his real mother is Mito (and unbeknownst to him, Mito is listening in and hears this).

* Kurapika revealing his powers to Gon, Leorio and Killua. The act of doing so was a great risk. One of the Troupe members, Pakunoda, had the power to read minds. If they were to be captured and Pakunoda were to read their minds, all of Kurapika's weaknesses would be exposed. Gon begs Kurapika to point a Nen arrow at his heart so that it would kill him if he were to reveal his secret. Killua and Leorio follow suit, agreeing that it was a good option. Kurapika, however, refuses their offer. He says that he would not mind it even if they somehow managed to reveal his secret. He had [[PowerOfTrust good friends]] ..

* Near the end of the Yorknew City arc, Kurapica and Pakunoda exchange hostages, with Kurapica trading Chrollo in exchange for Gon and Killua. To Gon's surprise, Kurapica isn't visibly upset, but instead greets them with [[WhenHeSmiles a cheerful smile]]. He's given up his chance at the revenge he's always wanted so his friends will be safe, and he's just fine with that.

** From the same arc-- Gon decides the first thing he's going to do when he meets his father for the first time? Introduce him to Killua: his best friend.

** Their last moments together. Mereum went from someone who wanted to take over the world to someone who just wanted to spend the last few hours of his life playing a board game with someone he had come to care deeply about. When hetells Komugi the poison is contagious, she tells him she won't leave his side and holds his hand when he starts to lose consciousness, thinking she'll be joining him soon.

* Killua vowing to protect not only his little sister Alluka, but also Nanika, her wish-granting alter ego. Especially since this was seconds after [[TearJerker Killua told her to never come out, and reduced the poor thing to tears.]] After being [[{{WhatTheHellHero}} called out on this]] by Alluka, Killua tells Nanika he was wrong and he'll always protect both of them, before tearfully asking for her forgiveness. She forgives him.

-->''"[[spoiler:We'll always be together, even in death.]]"''

* Killua vowing to protect not only his little sister Alluka, but also Nanika, her wish-granting alter ego. Especially since this was seconds after [[TearJerker Killua told her to never come out, and reduced the poor thing to tears. After being [[{{WhatTheHellHero}} called out on this]] by Alluka, Killua tells Nanika he was wrong and he'll always protect both of them, before tearfully asking for her forgiveness. She forgives him.
** In a rare PetTheDog from his mother; having viewed Killua's DeclarationOfProtection over a monitor, she decides to remove the restriction movements she placed on Killua and allows him to watch over Alluka freely.

* Meryem goes on a speech on how sociopathic he is and is about to kill Komugi, then he sees her being attacked by a hawk. He kills it and asks why she didn't ask for help, she answers she didn't want to bother anyone. It serves as heartwarming development of character for someone had previously being perceived as a complete psycho.
** Their last moments together. Meryem went from someone who wanted to take over the world to someone who just wanted to spend the last few hours of his life playing a board game with someone he had come to care deeply about. When Meryem tells Komugi the poison is contagious, she tells him she won't leave his side and holds his hand when he starts to lose consciousness, thinking she'll be joining him soon.
--> '''Komugi:''' Goodnight, Meryem.

* Killua vowing to protect not only his little sister Alluka, but also Nanika, her wish-granting alter ego. Especially since this was seconds after [[TearJerker Killua told her to never come out, and reduced the poor thing to tears. After being [[WhatTheHellHero called out on this]] by Alluka, Killua tells Nanika he was wrong and he'll always protect both of them, before tearfully asking for her forgiveness. She forgives him.

** And then after that, there's Gon saying goodbye to Aunt Mito. Made even more heartwarming in the 1999 anime when he tells her that as far as he's concerned, she isn't just like a mother to him, she ''is'' his mother.