So this is complicated to answer lol-because it's an excellent question! Love for people who mistreat/abuse you is really complicated, and I'm really against shaming victims for how they feel towards their abusers. Mostly because I've been there, and frankly it's no one's place to tell a victim how to feel. Yes, I think Killua loves them. I also think Killua's perspective on his siblings and parents is very, very limited, simplistic, and childlike, and that has to be addressed at some point. Killua obviously loves Alluka, so I won't address this besides noting that it's interesting Alluka has no interaction with her parents really and has not been manipulated by them to the extent the other siblings have. As for Kalluto, we've never really seen him interact with Killua, but we know Kalluto's whole motivation for joining the Phantom Troupe is to get his brother back (probably Killua but miiiiight be Alluka? ) Killua is aware that Kalluto is jealous though, but there's no mention of Kalluto's probable feelings towards him. I think Killua cares about Kalluto, but has never really gotten to know him. As for Milluki, their relationship seems very typical older brother-younger brother but with like torture instead of slaps. I think they care about each other but aren't super close because Milluki is lazy about everything including how he interacts with his family (though Zeno comments that Milluki is very smart so I presume there's more under the surface). That being said, a lot of how Milluki treats Killua is probably related to his parents and trying to get their approval.
When Milluki, Kikyo, and Silva watch Killua's interactions with Alluka, it's very obvious that 1) Milluki wants his parents' approval, and 2) Milluki is of his parents. I doubt Killua's really taken this into consideration, though. As for Illumi, well, Killua very clearly loves his brother. Killua calls him Illu-ni, and for a specific scene, I direct you to the scene where Illumi refuses to acknowledge Alluka as his sibling and asks Killua to have Alluka kill him (have you noticed how a common thread among the three main foil antagonists in HxH-Illumi, Chrollo, Hisoka-is that they don't really value their lives? That's for another time though). Killua starts sobbing and sends him home to safety instead. Killua kills people like… Killing isn't a problem for him so if he didn't care about Illumi he would have been just fine killing him, but he wasn't. Returning to the issue of his parents, I do think Killua loves them, but he doesn't seem to realize (as a child wouldn't! It's not his fault) how their favoritism of him has affected their family. He does not know that, for example, Silva told Illumi to put the needle in Killua's head. Yes, I also think Killua loves his parents-especially his father, and I think he wants his father's approval as every child does. I just think he, like most children, does not yet realize the extent to which they are responsible for a lot of the family dysfunctional dynamics. Killua's parents really manipulate their other children into manipulating Killua to get what they want from Killua. That's… fucked up, and I really want to see Killua realize this at some point.
As of June 10, 2021, eight volumes have been published as part of the Progressive series.
Sword Art Online is a Japanese light novel series written by Reki Kawahara with accompanying illustrations drawn by abec. The series takes place in the near-future and focuses on various virtual reality MMORPG worlds. ASCII Media Works began publishing the novels on April 10, 2009 under their Dengeki Bunko imprint. Russia. With more than 16 million copies in print worldwide, there are future plans for publications in Germany, Italy, Austria, Switzerland, Vietnam and others. Kawahara also began writing a parallel series of light novels titled Sword Art Online: Progressive, a spin-off that focuses on the clearing of Aincrad, unlike the Aincrad stories of the main series. As of June 10, 2021, eight volumes have been published as part of the Progressive series. In addition to the original storyline of Sword Art Online and Sword Art Online: Progressive, Kawahara has also written and published Sword Art Online side stories. Accel World, have been sold at Comitia, Dengeki Bunko's Fair and have come along with the limited edition Blu-Ray/DVD Sword Art Online compilation volumes.
39;s Regret, written by Watase Souichirou and illustrated by Ginta.
Before Sword Art Online was published, Kawahara had posted Sword Art Online novels on his website and there are still a few side stories on Sword Art Online, although the original novels have been removed. In addition, Kawahara has published a side story of Sword Art Online in one of his other works, Accel World. In the tenth volume of Accel World, there is a chapter where it depicts a cross over between Sword Art Online and Accel World. Several of the side stories that he has released are in a collection called the Sword Art Online Material Edition, sold at the Comitia dōjinshi-selling event, which range from novels to manga. However, all of the art in the Material Editions is drawn by Kawahara himself. Aside from the light novels written by Kawahara, there are also two spin-offs written by other authors with supervision by him. The first one is Sword Art Online Alternative: Gun Gale Online series written by Keiichi Sigsawa and illustrated by Kouhaku Kuroboshi, while the other is Sword Art Online Alternative: Clover's Regret, written by Watase Souichirou and illustrated by Ginta. While both of these series take place in the same world as the main series written by Kawahara, they each feature different characters as the focus compared to the main series.
Afterword of the first light novel volume.(April 2009).1〉アインクラッド (電撃文庫) (in Japanese).26 V (in Japanese).(October 2012).1 (電撃文庫) (in Japanese).(June 2021).8 (電撃文庫) (in Japanese). Kawahara, Reki.(in Japanese).
Sword Art Online"Light Novel and Manga Release Details Listed". Kawahara, Reki (22 April 2014). Sword Art Online 1: Aincrad.(10 August 2009).2〉アインクラッド (電撃文庫) (in Japanese). Sword Art Online 2: Aincrad.(10 December 2009).3〉フェアリィ・ダンス (電撃文庫) (in Japanese). Sword Art Online 3: Fairy Dance.(April 2010).4〉フェアリィ・ダンス (電撃文庫) (in Japanese). Sword Art Online 4: Fairy Dance.(August 2010).5〉ファントム・バレット (電撃文庫) (in Japanese).
Sword Art Online 5. Yen On.(December 2010).(6) (電撃文庫) (in Japanese). Sword Art Online 6. Yen On.(April 2011).7〉マザーズ・ロザリオ (電撃文庫) (in Japanese). Sword Art Online 7. Yen On.(August 2011).8〉アーリー・アンド・レイト (電撃文庫) (in Japanese). Sword Art Online 8. Yen On.(10 February 2012).(9) (電撃文庫) (in Japanese). Sword Art Online 9. Yen On. (July 2012).10〉アリシゼーション・ランニング (電撃文庫) (in Japanese).
Sword Art Online 12. Yen On.(10 August 2013).(13) (in Japanese).
Sword Art Online 10. Yen On.(December 2012).11 (電撃文庫) (in Japanese). Sword Art Online 11. Yen On.(April 2013).(12) (電撃文庫) (in Japanese). Sword Art Online 12. Yen On.(10 August 2013).(13) (in Japanese). Sword Art Online 13. Yen On.14 (in Japanese). Sword Art Online 14. Yen On.15 (in Japanese). Sword Art Online 15. Yen On. (in Japanese).
Sword Art Online 16. Yen On.17 (in Japanese). Sword Art Online 17. Yen On.18 (in Japanese). Sword Art Online 18. Yen On. Yen Press (November 12, 2019). "Hi! Thanks for bringing this to our attention. Sword Art Online 18 is being released January 7th. We'll be sure to have the paperback listing on our site updated as soon as possible".19 (in Japanese). Sword Art Online 19. Yen On.20 (in Japanese). Sword Art Online 20. Yen On.21 (in Japanese). 22 (in Japanese).