Let's discuss feelings in Bleach because there's a lot of double standards here and it hurts me to watch people think they've "debunked" arguments but they only told a vague fairy tale. That's why I'm saying that Rukia had fallen in love earlier than you think. In fact I would even say that she fell in love before Orihime. Orihime may have had a crush on Ichigo first, but she never said “love” until the arrancar saga.
Rukia fell in love first. In fact there's textual evidence for this. We all know this iconic scene. Kubo was never into romantic tales, however he wouldn't pull this BS out of his ass for shits and giggles. He's not that kind of writer. Every scene has purpose! Stop the disrespect!
This scene isn't meant for fanservice. It's meant for setting up motive. Why does Rukia want to leave?
Before I answer that. Ladies and Gentlemen, this is what literary analysis calls DRAMATIC IRONY. In which the audience knows something that characters might not know. For example like when we know Isshin is a Shinigami, but Ichigo doesn't know. We know Rukia's true feelings but Ichigo and other people don't because they obviously can't read her inner monologue. Ichigo can't read her motives until her tears tell him the truth. Now to answer the original question above. She left because she was afraid that if she stayed any longer in the living world, her already developing feelings would make it harder to leave later on. She needed to get out of Ichigo's proximity so that her attachment can't be used as leverage or puts him in danger. After all it was her emotional attachment to Kaien that allows her to identify every emotion that she's feeling at this moment in the story. She doesn't want to bring Ichigo the same demise as Kaien. It's because of her emotions that Kaien's death hit her so hard. Without emotions and that attachment to Kaien, it would have been just another death in the Soul Society. Why is this important? Because Rukia's trying to learn from her past. Ichigo's stubbornness messes up her plan, but it's also what ends up saving them in the long term. She runs away with the hope of forgetting all of her experiences with Ichigo. Ichigo did the same thing Kaien did with Rukia in the 13th division. Ichigo didn't make her feel alone or like an outcast. They both treated her the way she always hoped people would treat her. With respect, and as an equal. She never wanted to be put down nor be put on a pedestal because of her last name. Or because of her rank. But everyone did, even her future husband. The only two people who canonically didn’t was Ichigo and his cousin. Rukia just has a weak side for men like that. Rukia has a type unlike Orihime. We know why she loves Ichigo, but there's no clear reason as to why Orihime does. It's very broad, and not narrowed down to a specific reason. Which makes her crush easy to attack with no actual solid defense. I can tell you EXACTLY where Ichigo and Rukia's relationship changed from salty coworkers to immediately more than friends. I've reread Bleach multiple time, and have yet to see the exact moment where Ichigo and Orihime's feelings change. Most of it looks like it's offscreen.
Just so no one gets confused. I'm referring to this scene. This was where Ichigo and Rukia's relationship could never go back to being coworkers and friends.
Anyways, people like to argue that Orihime is the one that likes him so she is guaranteed that "happy" ending. I call BS because Nel and Riruka had just as much infatuation with our protagonist, but all I see is them getting the short end of the stick. Orihime IS NOT SPECIAL. But Rukia IS special. This woman "COINCIDENTALLY" has a paralleled past to our protagonist. She "COINCIDENTALLY" spent Ichigo's entire past arc as his only form of foundation and support. And she "COINCIDENTALLY" is the one to be asked about HER feelings because she's not as open about her emotions, since she's a SHINIGAMI. Shinigami have LITERALLY been taught to not be emotional. Duty before love. Rukia's characterization and occupation don’t allow her to confess straight up. Orihime has the privilege of no limitations. Rukia isn't as lucky! Why the hell would Kubo emphasize this so much for it be a fecking dead end?!
But that's why Rukia's confession is in the form of denial. Because in order to keep her IN CHARACTER, Kubo needs to write a confession that sounds like Rukia. He must emphasize how strong her feelings are. They are so strong that they overcome her usual stoicism, sternness.
Byakuya himself knew that Rukia only showed this much emotion towards Kaien. That's why he concluded that there's something special about Ichigo. He has identified the pattern.
All of this had purpose. I refuse to believe it was all for nothing. This scene was a confession, and just a sad reminder that unfortunately Ichigo and Rukia's ending was always on a tight rope. He put too much effort into their relationship. He put a freakish amount of effort into their relationship. And honestly this makes the story make more sense, in my opinion. Think about it like this. If Rukia was not in love in this scene then it wouldn’t be as memorable in the Ichiruki fandom. And Rukia would be a completely different character. By Rukia already having feelings they stimulate Ichigo into finding out his own feelings (which is in the Lost Agent Arc). And it makes sense because Rukia might fall easier, but she’s more passive when it comes to answering to her desires. Just look back at her past with Kaien, and her reaction towards his wife. She’s not the type to pursue feelings. But Ichigo is more aggressive than her. But he’s more dense as well. Ichigo is the type to initiate the relationship, but he has to be aware of it. How can you be aware of it if your dense? I mean the fact that Ichigo is dense about Orihime’s blatant feelings can’t be a coincidence. For me, it almost seems like Ichigo is dense, not because he’s not meant to see Orihime’s feelings, but because it makes it harder for him to identify his own feelings for a certain person (personally I thought and still think that it’s supposed to be Rukia). It delays endgames, and allows for more satisfying development. However, this could just be my optimism speaking, but I don't think Kubo is stupid. But that time frame for TYBW was ridiculous and I truly believe it was a factor in their final decisions. But I might be blinded by my optimism. Well anyway, this was another piece of analysis. Just want to call out some hypocrites. I'm right now putting on the table that Rukia arguably has just as much feelings for Ichigo. So the argument that Orihime is "obligated" to Ichigo's love is too vague. It's a horrible argument, but I'm always open to discussion. Respectfully of course. But then again this is social media so...
My next analysis is probably going to be on this gorgeous scene. I'm just going to explain its significance and what makes it an irrefutable Ichigo and Rukia moment. Please look forward to that! Thank you to everyone that read this far. Have a wonderful day!
Also no hate on Renji and Orihime. I know Renji thought he had good intentions, but if he's so special then he should have been able to fix it before 40 years of no interactions. And Orihime is a sweetie, but her unrealistic look on life is just too polar to my look on life. I'm a realist. I can't get behind that especially when she basically gets everything handed to her without much consequence. Reality would have hit normal women in the face if they were in Orihime's position. To me that's not a good message to teach to anyone.
Anyway thanks for reading! Love y’all!