#noob saibot is corrupted version of bi han and kuai liang acknowledged that

[cienie-isengardu]

I feel like if Bi-Han didn't love Kuai or was abusive it would've been stated. It'd also bring into question why Kuai would care to avenge him if he was treating him like trash. It's not Bi-Han is the only person he cares for, Tomas is literally right there. Like Kuai was jumping through hoops for this man and unless Bi-Han was some master manipulator which doesn't fit Bi-Han's personality since Bi-Han makes it really apparent when he doesn't like someone.

Seriously this is the guy who told Quan Chi his plan was insane to his face and Bi-Han's social skills are kind of lacking. You cannot convince me this guy was some puppet master. I'm not saying Bi-Han is dumb but he's not this master manipulator intent of using his brother's emotions.

Also why would he even bother? Seriously Bi-Han's main priority is survival, why would he care to manipulate his brother if he didn't care for him given it's not like he benefits from Kuai being around.

Kuai Liang was introduced as the younger brother of Bi-Han in Mortal Kombat II (November 1993) and their brotherhood has been a vital part of lore for literally three decades now. After such a long time, I too think if alive Bi-Han was ever meant to be seen as the abusive or uncaring brother, the source would outright say so already. Instead Mortal Kombat gives us a conflict between younger Sub-Zero and Noob Saibot, the resurrected yet corrupted by the dark magic version of Bi-Han. A corruption acknowledged by Kuai Liang himself, like he did in Mortal Kombat Armaggeddon:

And even within that conflict between alive Kuai Liang and Wraith Bi-Han, Noob Saibot was not always written as the vile creature out there to kill or hurt his younger brother for fun, which can be especially seen in an alternative timeline[1].

Did Kuai Liang idolize his brother? Most likely yes, as Bi-Han was his closest family he had and with unnaturally advanced ice skills, the older brother rose through ranks to the point Grandmaster acknowledged him as the most cunning Lin Kuei assassins. However it is not like Kuai Liang was completely blind to human Bi-Han’s flaws - the degree may vary from one source to another, like between one of the oldest Mortal Kombat comics (“he was stubborn in many ways”) and Mortal Kombat Legends: Snow Blind (“The dreams. For a long time, I thought the worst thing that I could become was my brother. I was wrong.”). The closest example I can think of in which Kuai Liang outright calling original Sub-Zero to be evil comes from Mortal Kombat: Defenders of the Realm TV animated series (1996) and even then it was said in context of serving the forces of Darkness, not if Bi-Han was abusive brother[2].

Yet within strictly game timelines, Kuai Liang may be angry at Noob Saibot, he may be disappointed by his brother’s (post mortem) choices but as far as I managed to check, he had never accused Noob Saibot of not loving him, or being uncaring or abusive when the man was alive. In contrast, Mortal Kombat 1 (2023) actually gives us Smoke’s accusation that MK1!Bi-Han was always cold to him and though this is not necessarily equal to being abusive, the game hints at an uneasy relationship between those two brothers. I don’t think original and alternative Kuai Liang has ever accused his Bi-Han of anything similar. Quite opposite actually, in MK11 Kuai Liang stated he thought (alive) Bi-Han shared the same values as him - while Noob Saibot noted that Kuai Liang always mimicked him. What may itself imply Kuai Liang's principles were inspired by elder brother.

The source material uses the word “corrupted” specifically to describe Noob Saibot, as to highlight that Noob is not the Bi-Han’s original self. Kuai Liang uses that word, and of all people he is the one that knew the best what kind of man Bi-Han was once. Otherwise I believe younger Sub-Zero would already remark that Bi-Han as an evil Wraith is no different from his human self and so far Kuai Liang did not say anything like that.

This is especially seen in Mortal Kombat 11 (2019) and Kuai Liang’s anger is understandable as Noob Saibot supported Kronika and Cyber Sektor that attacked and killed his clan members. However, as Sub-Zero’s ending shows, when he decided to study each second of Bi-Han’s life to understand what made his older brother the way he was, he tried to understand why Bi-Han’s embraced “Sektor’s corruption” and why "reveled in the vile power given to him by Quan Chi"

not why Bi-Han did not love him, or abused, or manipulated. Those have never been a matter of doubt, only the process of adapting into the darker side of Lin Kuei and life as Wraith . So once again, corruption by power - or even being a merciless assassin, does not necessarily mean Bi-Han was a bad brother. I know that for the majority of fandom one equals the other, however Kuai Liang has never accused Bi-Han of being on purpose cruel or uncaring toward him. If anything, the problem lies in the fact that Bi-Han embraced all the bad things that happened to him. Again, like the ending says, Kuai Liang needed to reshape Bi-Han's life (events) not Bi-Han’s whole character to get back the beloved brother he missed. So the problem did not lie in Bi-Han’s character itself, but in things that happened to him. 

And frankly, there is a lot to say about the fact that Bi-Han rarely speaks about honor in contrast to Kuai Liang, and how in general he is more aware of Lin Kuei’s dark deeds than his brother ever was. The original Sub-Zero seems to be much more disillusioned with how the world works and thus better at adapting to its cruelty. He even warned Kuai Liang in the past to never trust anyone, especially a family, and it is like the opposite act to manipulation. At the same time, Kuai Liang too was accused of having a “frozen heart”.

I think that ultimately it all comes down to what fans want - a tragedy about two brothers that by twist of cruel fate are destined to be enemies or story about a survivor of abuse/pathological system coming in terms of his trauma and realizing his brother was not a good man and building for himself a new, healthier life. Each story has a great potential on its own, however I personally feel that Mortal Kombat has never truly gone with the second scenario. Kuai Liang being blind to his brother and clan’s darkness may make sense when he does not have an outside relationship that made him rethink his own brotherhood with Bi-Han. Yet Kuai Liang, even a much older, experienced man still recognizes Noob as the corrupted version of Bi-Han, not the same man just with a different outfit. Despite all the bad blood between him and the Wraith, he has never truly abbadon hope to save his brother’s soul, so at least to me, it doesn’t sound like a man freeing himself from abuse and trauma by rejecting an evil family. 

And also, if we agree that Kuai Liang was either so indoctrinated by the clan or lacked any other support to recognize the abuse when it happened to him, then the same benefit of doubt should be given to Bi-Han, as he grew up in the same pathological environment. You can’t excuse one survivor of abuse and then condemn the other. The brothers dealt with their trauma in different ways but this is not good victim vs bad victim contest.

As for Bi-Han manipulating anyone... he was introduced in Mythologies: Sub-Zero as the most cunning Lin Kuei assassin and Noob Saibot was too hinted to be smart and biding his time while serving Shinnok, Quan Chi and Shao Kahn. So I believe he could be pretty cunning when needed. But yes, the man doesn't feel like a person bothering with manipulation for the fun of it. Sub-Zero, like all cryomancers in general(?), was a pretty straightforward man. Like I mentioned before, from source material it seems to me he rather kept warning Kuai Liang about not trusting anyone (and he did that as Noob Saibot too in MK11's intro dialogues) than playing on his younger brother’s loyalty. But to be honest, we don't have enough sources to say for sure how growing up in Lin Kuei looked for both.

SIDENOTES:

[1] Sadly, MK11 did not fully utilize the conflict between Redemption (Kuai Liang) vs. Recognition (Noob Saibot!Bi-Han) alluded by the official BIOs and intro dialogues. Frankly, the mentioned game barely did anything with their brotherhood in main story mode, however the intro dialogues paint an interesting take on brothers feelings toward each other, especially Noob’s one toward Kuai Liang, as they differ from original timeline Noob. Back then he was out there “free from compassion” [MK Deception]

and at least twice tried to murder his brother (attack on Lin Kuei/MK Armageddon and Noob-Smoke’s ending/MK Deception), while in the MK11’s intro dialogues for example, he does not side with Frost - who from story mode perspective was the logical ally, as she wanted to kill Kuai Liang. Instead Noob openly dislikes and disrespects her and even criticizes his brother for trusting her in the first place. Similar thing happens with Geras ordering Noob to bring Sub-Zero to Kronika and suddenly Noob goes with his standard “only death are my kin” 

Geras: Bring your brother to Kronika. Noob Saibot: The dead are my clan now. Geras: Do you serve or do you not? 

while he has no problem acknowledging his and Kuai Liang’s brotherhood. The intro dialogues in second timeline definitely played a different angle than Noob as Bi-Han completely stripped of his humanity. And again, sadly NRS did not dwell on it in the main story.

[2] Mortal Kombat: Defenders of the Realm actually referred to events from the Mortal Kombat film (1995), in which Liu Kang killed Sub-Zero thanks to Kitana’s advice to use an element “that brings life”. Even the scene of original Sub-Zero’s death was similar to the one from the movie, minus of course the violence/impaling itself. Yet the film outright stated that Scorpion and Sub-Zero were slaves under Shang Tsung’s power, so in that case, “Bi-Han” wouldn’t be on Mortal Kombat Tournament on his own free will for all we know.  The full dialogue about MK:DotR!Kuai Liang’s reasons for joining the good guys side below:

Sub-Zero: It is true, I was once Lin Kuei  and fought for the forces of darkness. But that was long ago…Back when my brother was still alive…It has been many years now since Liu Kang faced my brother in Mortal Kombat. [...] Sonya: So, why’d ya turn on your clan anyway? Jax: Girl, your parents ever teach you the word "tact?" Sub-Zero: After his death, I realized that my own brother was innately evil and without honor… I could no longer fight for what my clan believed in…That was when I decided to help you. Jax: Then why the disappearing act? Sub-Zero: In spite of what I knew, I was too filled with hate to go on. So I sought seclusion to try and find inner peace. Sonya: I guess what we’re all wondering is…can you ever really forgive Liu Kang for icing your brother? Sub-Zero: What Liu Kang did, he did to save Earth. He fought with honor and great purpose.

It was cartoon intended for children so it is make sense that brutality and complexity was reduced to acceptable norms, however A) “Kuai Liang” still didn’t call “Bi-Han” and evil/abusive brother and needed time to sort out his feelings, including hate (for Liu Kang) and  and B) saying “Bi-Han” and in general Lin Kuei were evil was the easiest way to explain why he changed sides than saying anything else (this point is actually relevant to “Kuai Liang”’s feeling for Lin Kuei/Bi-Han seen in the second episode - he may consider them evil but he would fight Scorpion to avenge what he did to Lin Kuei and wondered if Liu Kang could beat “Bi-Han” without Kitana’s advice so his feelings definitely aren’t one dimensional. I think it is safe to assume he was still processing his emotions and relationship with Lin Kuei/"Bi-Han") 

I guess this cartoon may be one of the reasons why people tend to consider Bi-Han to be an evil brother while painting Smoke as the only one Kuai Liang's brother that should matter. Still, a source is a source, so I’m bringing it to the table.