quinton space

Ichigo’s name is comprised of two kanji – one obviously the kanji for the number one, the other a kanji that means ‘to protect’. We all know this. This leads to Ichigo’s name potentially having two interpretations: ‘one protector’ (or as the official eng translation put it, the one who protects), or ‘to protect one thing’ (the translation used in the scanlator’s versions + official kr translation). Both would make sense given the context of the entire story, but I tend to think the latter version is slightly more relevant (not necessarily more accurate— just more relevant), mostly because in chapter 19, straight after hearing the meaning of his name, Ichigo goes on to single out one thing (one person) that he wants to protect—his mom. 

(And why does he single out his mom for this honour? Because his mom always protected him. This is relevant a little later.)

He then does go on to say that as his sisters were born and he went to the dojo and got stronger, the list of things he wanted to protect grew, so it’s absolutely valid to read his name as just meaning ‘protector’. But, despite that, it’s very clear in the text that Ichigo always has one thing (person) that he wants to protect above all no matter what. This is the ‘one’ thing that he associates his identity of ‘protector’ to. Initially, it’s his mom—because when she dies, despite the ‘growing list of people he wants to protect’ still existing, Ichigo loses his sense of identity as ‘the protector’. Sure, he still protects his sisters, but it’s duty driving him— he no longer thinks of himself as a protector. How can he, when, in his view, he’s the one who practically killed his mother? His ‘growing list of people to protect’ halts to a stop, and years later, we see him telling Rukia that he’s ‘not a good enough guy to stick his neck out for other people’. This is a lie, as we all know, but it’s important that Ichigo is espousing this rhetoric. He has stopped actively wanting to protect. 

So, despite Ichigo having an innate desire to protect, I would argue it’s conditional – 1) dependent on the one person he wants to protect the most (e.g. his mom, and, as I will argue in a moment, Rukia) being alive and well, because otherwise he just falls into despair and rejects his identity as protector, and 2) initially dependent on the subject of protection being someone close to him. Ichigo, despite having progressed to ‘I will definitely protect everybody’ by the tybw arc, did not start there—it was a progression! He starts off very small and quite selfish – first, the person most important to him, his mom. Then his family. Then his friends. Then friends of friends, then acquaintances, then—and so on. This is why I said Ichigo is self-centred: everything he does is dependent first and foremost on the things and people that are most important to him. (Which is fine for a normal person! Maybe not so fine as a shounen protagonist, though that part comes later.) Ichigo doesn’t start off with some lofty ideal to protect the whole world – compare that to Rukia, who lands in the story and immediately demands him to protect everybody, regardless of distance or convenience. As dux put it in his excellent meta, this is an instinct towards protection versus a philosophy of protection. Ichigo has an instinct to protect, like most people do! But Rukia has a philosophy of protection, which most people can’t even begin to fathom or try to emulate. (This will, again, be important for a later point in this post, but for now, back to ichigo’s name.) 

So basically, we have established so far that: Ichigo’s name means one who protects or protector of one thing. But whichever interpretation we go by, it’s evident in the text that Ichigo has a… tether person, of sorts, that he ties the meaning of his name and his identity of ‘protector’ to—a person he wants to protect above all. Initially it’s his mom. But after his mom dies? 

It’s Rukia. 

It’s blatant. Ichigo being unable to save Rukia in ch56 broken coda is DIRECTLY paralleled with him being unable to save Masaki. At the end of the arc, in having saved Rukia, Ichigo regains his identity as protector finally gets some closure re: the Masaki era of his life: ‘the rain’s finally stopped’. It’s very clear that Rukia’s importance to his identity as protector is equivalent to the importance that Masaki had on it. Rukia has now become his ‘tether’; Rukia is now the person he wants to protect above all; Rukia is the one, who, should he fail to protect her, he would fall into despair and reject his protector identity again. He WAS a little down about being unable to protect Tatsuki, Chad, and Orihime in the HM arc, but it was nothing like the abject despair he experienced at Masaki’s death + Rukia being taken away for execution, and as soon as RUKIA comes back and affirms his identity, despite the fact of his failure still existing, Ichigo perks straight back up. Basically, failures to protect people other than Rukia get Ichigo down, but it’s not enough to keep him down as long as Rukia’s still standing. 

Ichigo also consistently goes apeshit over Rukia’s safety in particular. He’s not spurred into action re: going to find the Vaizards until Rukia becomes hurt. He thinks of Yammy and Ulquiorra, but his eyes don’t glaze over black until he thinks of Grimmjow, who has hurt Rukia. He refuses to split up and Rukia specifically calls him out  that it’s out of concern for HER safety. As soon as he feels Rukia being cut down, he immediately throws away the mission to go save her instead. And most importantly – what’s the main criteria for Ichigo deciding on the one he wants to protect the most? It’s the person who protects HIM. Rukia is one of the only people in the text who consistently protects Ichigo, physically, mentally, and emotionally. (She is also the only person that the text refers to as having ‘saved’ Ichigo. Nobody else gets this distinction.) 

Alright! So Ichigo’s instinct towards protection has a self-centred bent to it, and the person at the centre of this instinct has gone from being Masaki to Rukia. So what now from here? 

A little bit of a tangent: when I first read the chapter regarding the meaning of Ichigo’s name, I was a little taken aback, because – what a selfish name for a shounen protag, for someone who’s supposed to go on to become a hero of the world. Heroes don’t get to protect just one thing, they have to protect everybody! How is Ichigo going to be a shounen protag saving the whole world, if he’s only going to protect one thing? 

To answer this question, we need to have a look at what makes a typical shounen protag. Look at Naruto, whose ‘ninja way’ has rehabilitated countless people, who eventually became Hokage, so that ‘his ninja way’ officially became adopted as the whole Leaf Village’s ‘ninja way’. Look at Luffy and his crew, whose carefree attitudes and ride-or-die comradeship between their crew members is widely admired and emulated. Look at Fairy Tail, where Natsu’s guild is the ideal for what a guild should be, and many guilds have reformed in their image with their values. What makes a typical shounen protagonist, I would argue, are two main things: an indisputable, unshakeable, almost inhumanly good ideal widely recognized within the canon as the way that things should be, and the faith, power, and drive necessary to rehabilitate people to this ideal and change the world so that it becomes closer to this ideal. 

Naruto is the ideal of a ninja. Luffy and his crew are the ideal of a pirate crew. Natsu’s Fairy Tail guild is the ideal of a mage guild. 

Is Ichigo the ideal of what a Shinigami should be? 

Not initially! Initially, he’s just a prickly little kid with a shitload of trauma and depression to boot! Initially, his instinct to protect has a self-centred bent to it! Initially, he’s not even a Shinigami at all! 

This is where Rukia comes in. Rukia and her philosophy of protection is the ideal of this series – she is what all Shinigami should be. The text isn’t even subtle about this—Rukia canonically has the most beautiful sword (soul) in all of Soul Society. Realistic or not, Rukia is the ‘absolute good’ of this universe—her ideal is, theoretically, the universal ideal. 

But idealism alone doesn’t make Rukia the protagonist-- Rukia lacks the faith, power and drive necessary to turn people to her way of thinking and enact change, which is the other key component of a shounen protag. This is the part that Ichigo supplies—his complete and utterly unshakeable faith in Rukia and her values, the power necessary to back those values, and the ability to spread these values far and wide so that other people start to take up these values as well. I said above that Rukia’s philosophy of protection is so far-fetched that most people can’t even begin to fathom or emulate it—but Ichigo is not ‘most people’. He’s a shounen protag, goddammit! He has the ability to take up an ‘ideal’ that for most people would be impossible, and actually enact change towards that ideal. 

This is why Ichigo and Rukia are double protagonists. Not because they were designed to be matchy-matchy or because of their avalanche of matching titles or whatever else. This is why. They are literally two halves of one shounen protagonist. Kubo called them sand and rotator in the side A and B poems, and he could NOT have picked a better analogy for them. Think of a watermill (or a sand mill, as the analogy is given), which is used to grind grain. The mill by itself cannot perform its purpose any more than the water by itself can magically grind the grain. The water needs to be driven by the wheel through the right mechanisms, and the wheel needs the water to actually function. Rukia drives Ichigo, points him in the right direction with her values, and Ichigo supplies the force necessary to enact change. Rotator, and sand. One protagonist, split into two. 

(As a completely unrelated aside, I don’t know what it’s like in Japan, but in Korea ‘grinding the grain’ is a euphemism for sex, and watermills are inextricably associated with illicit liaisons. They’re the eastern world’s equivalent to the western world’s stables- any raunchy business conducted outside is usually conducted in a watermill.) 

This is also why Ichigo’s name wasn’t something more all-encompassing. He can ‘protect one thing’ and still be a hero – as long as the ‘one thing’ he protects is Rukia. He wants to protect Rukia above all else, to the detriment of others, even (as evidenced by him turning away from rescuing Orihime to rescue Rukia)—but Rukia tells him no, no, I refuse to be protected by you, you have to protect the whole world. This is why it HAS to be Rukia for Ichigo – anyone with less than the absolute selfless ideal that Rukia has could never make Ichigo into the hero. Rukia turns Ichigo’s head to the whole world, opens his eyes to the possibility of protecting more than those in his immediate circle, makes him selfless enough to go through with it. Rukia makes Ichigo the hero. (Big aside: I’m not using ‘hero’ and ‘protag’ interchangeably here. Ichigo is the ‘hero’ of the narrative, but BOTH ichigo and rukia are the ‘protagonists’ of the story.) 

But that isn’t the end of it. I have mentioned, in the past, that Bleach is not typical shounen, that it is structured more like YA lit and should be analysed as such. ‘But Sera! You just spent like 2 A4 pages talking about why Ichigo and Rukia are Standard Shounen Protags together!’ Ah but you see, that’s only initially. INITIALLY, Ichigo and Rukia need each other to become One Whole Stock Standard Shounen Protag. Rukia lacks faith and drive, Ichigo lacks ideal. They need the other to support their flaws, initially. To be completely honest, this is an excellent way to start an unhealthy codependent relationship. The most beautiful part about Ichiruki is that they don’t go down this path at all. They start becoming a whole shounen protag individually, by adopting the other person’s strength as their own. Rukia’s ideals inspire Ichigo, and by tybw, he is as avid about protecting everybody as Rukia is. Rukia sees Ichigo’s unrelenting faith in the fact that she is a good person worth saving, and starts believing in it herself and reciprocates in kind in HM and FB arcs. This is where the YA component comes in—YA protags, unlike typical Shounen Protags, don’t start off with an unapproachable ideal and the power+faith+drive necessary to change the world with it. They GROW into it. That is what Ichigo and Rukia are doing—they are both growing throughout the whole story to fit their protagonist roles, so that eventually, they can become One Whole Independent protagonist on their own. 

It’s a beautiful, perfectly balanced, ironic jigsaw puzzle: Rukia had the ideal, but didn’t have the ability to turn others to this ideal. The only person she turned to it was Ichigo, but that was enough—Ichigo turns everyone else to it as well, overcoming centuries of tradition. Ichigo had the faith and drive, but no-one to put it behind. The only person he put it behind was Rukia, and that was enough—she and her values guide his choices and actions, and he becomes heroic. Ichigo and Rukia each failed one criteria for being a shounen protag, except with each other, BUT THAT WAS ENOUGH. Affecting and changing just one person—each other—was enough to set everything in motion.

A couple other points that I couldn’t find a place to fit into the essay cohesively, but think they’re still worth a mention:

Rukia says ‘all souls should be protected’, and she enacts this by protecting Ichigo, who is a hybrid of all the different soul types present in the narrative: human, quincy, hollow, reaper. Ichigo, despite being such a mixed entity, identifies firmly as shinigami, not because the shinigami convinced him with their ironclad, lofty morals but because Rukia did. 

If Ichigo’s main flaw is being self-centred and tunnel visioned + a weird sort of superiority/hero complex, then Rukia’s main flaw is probably the exact opposite - despite having this incredible ideal, her lack of faith in herself + her tendency to obey the system in all but the most dire, life-threatening situations. Even their flaws are a perfect balancing act, mitigating each other out. (Rukia’s main flaws I probably want to go into in a bit more detail some other time, since it’s not something the fandom in general has much discussion on.)

So! In summary, the tl,dr version: 

Ichigo’s name means ‘protector’ or ‘to protect one thing’ (both versions have been used in official translations). The latter is more relevant, as I have explained above. This ‘one thing’ initially is his mom, but by the end of the SS arc, it has very firmly become Rukia, again evidence listed above. 

This had the potential to be problematic, as it’s not very heroic of someone to want to protect just one person, to hell with everyone else. BUT the narrative sidesteps that by making Ichigo and Rukia two halves of one shounen protagonist, and making them work best when they are together.

Shounen protags require two components: an ideal, and the ability+desire to enact that ideal. Rukia had the former, Ichigo had the latter. That’s why it’s not problematic for Ichigo to want to protect just one person most— because that one person is actually the ‘ideal moral standard’ of their entire universe, and she keeps telling him to use his powers for good and not just her. 

But that’s not even all. Initially, they need the other to become ‘whole’, so to speak— but they don’t stay that way. Ichigo and Rukia have an immensely positive impact on each other, and help each other grow to adopt the best traits of the other and become a hero in their own right. Again, this is why they are both protagonists— because both of them kept growing and changing, right up to the final arc. 

Ichigo’s name is comprised of two kanji – one obviously the kanji for the number one, the other a kanji that means ‘to protect’. We all know this. This leads to Ichigo’s name potentially having two interpretations: ‘one protector’ (or as the official eng translation put it, the one who protects), or ‘to protect one thing’ (the translation used in the scanlator’s versions + official kr translation). Both would make sense given the context of the entire story, but I tend to think the latter version is slightly more relevant (not necessarily more accurate— just more relevant), mostly because in chapter 19, straight after hearing the meaning of his name, Ichigo goes on to single out one thing (one person) that he wants to protect—his mom. 

(And why does he single out his mom for this honour? Because his mom always protected him. This is relevant a little later.)

He then does go on to say that as his sisters were born and he went to the dojo and got stronger, the list of things he wanted to protect grew, so it’s absolutely valid to read his name as just meaning ‘protector’. But, despite that, it’s very clear in the text that Ichigo always has one thing (person) that he wants to protect above all no matter what. This is the ‘one’ thing that he associates his identity of ‘protector’ to. Initially, it’s his mom—because when she dies, despite the ‘growing list of people he wants to protect’ still existing, Ichigo loses his sense of identity as ‘the protector’. Sure, he still protects his sisters, but it’s duty driving him— he no longer thinks of himself as a protector. How can he, when, in his view, he’s the one who practically killed his mother? His ‘growing list of people to protect’ halts to a stop, and years later, we see him telling Rukia that he’s ‘not a good enough guy to stick his neck out for other people’. This is a lie, as we all know, but it’s important that Ichigo is espousing this rhetoric. He has stopped actively wanting to protect. 

So, despite Ichigo having an innate desire to protect, I would argue it’s conditional – 1) dependent on the one person he wants to protect the most (e.g. his mom, and, as I will argue in a moment, Rukia) being alive and well, because otherwise he just falls into despair and rejects his identity as protector, and 2) initially dependent on the subject of protection being someone close to him. Ichigo, despite having progressed to ‘I will definitely protect everybody’ by the tybw arc, did not start there—it was a progression! He starts off very small and quite selfish – first, the person most important to him, his mom. Then his family. Then his friends. Then friends of friends, then acquaintances, then—and so on. This is why I said Ichigo is self-centred: everything he does is dependent first and foremost on the things and people that are most important to him. (Which is fine for a normal person! Maybe not so fine as a shounen protagonist, though that part comes later.) Ichigo doesn’t start off with some lofty ideal to protect the whole world – compare that to Rukia, who lands in the story and immediately demands him to protect everybody, regardless of distance or convenience. As dux put it in his excellent meta, this is an instinct towards protection versus a philosophy of protection. Ichigo has an instinct to protect, like most people do! But Rukia has a philosophy of protection, which most people can’t even begin to fathom or try to emulate. (This will, again, be important for a later point in this post, but for now, back to ichigo’s name.) 

So basically, we have established so far that: Ichigo’s name means one who protects or protector of one thing. But whichever interpretation we go by, it’s evident in the text that Ichigo has a… tether person, of sorts, that he ties the meaning of his name and his identity of ‘protector’ to—a person he wants to protect above all. Initially it’s his mom. But after his mom dies? 

It’s Rukia. 

It’s blatant. Ichigo being unable to save Rukia in ch56 broken coda is DIRECTLY paralleled with him being unable to save Masaki. At the end of the arc, in having saved Rukia, Ichigo regains his identity as protector finally gets some closure re: the Masaki era of his life: ‘the rain’s finally stopped’. It’s very clear that Rukia’s importance to his identity as protector is equivalent to the importance that Masaki had on it. Rukia has now become his ‘tether’; Rukia is now the person he wants to protect above all; Rukia is the one, who, should he fail to protect her, he would fall into despair and reject his protector identity again. He WAS a little down about being unable to protect Tatsuki, Chad, and Orihime in the HM arc, but it was nothing like the abject despair he experienced at Masaki’s death + Rukia being taken away for execution, and as soon as RUKIA comes back and affirms his identity, despite the fact of his failure still existing, Ichigo perks straight back up. Basically, failures to protect people other than Rukia get Ichigo down, but it’s not enough to keep him down as long as Rukia’s still standing. 

Ichigo also consistently goes apeshit over Rukia’s safety in particular. He’s not spurred into action re: going to find the Vaizards until Rukia becomes hurt. He thinks of Yammy and Ulquiorra, but his eyes don’t glaze over black until he thinks of Grimmjow, who has hurt Rukia. He refuses to split up and Rukia specifically calls him out  that it’s out of concern for HER safety. As soon as he feels Rukia being cut down, he immediately throws away the mission to go save her instead. And most importantly – what’s the main criteria for Ichigo deciding on the one he wants to protect the most? It’s the person who protects HIM. Rukia is one of the only people in the text who consistently protects Ichigo, physically, mentally, and emotionally. (She is also the only person that the text refers to as having ‘saved’ Ichigo. Nobody else gets this distinction.) 

Alright! So Ichigo’s instinct towards protection has a self-centred bent to it, and the person at the centre of this instinct has gone from being Masaki to Rukia. So what now from here? 

A little bit of a tangent: when I first read the chapter regarding the meaning of Ichigo’s name, I was a little taken aback, because – what a selfish name for a shounen protag, for someone who’s supposed to go on to become a hero of the world. Heroes don’t get to protect just one thing, they have to protect everybody! How is Ichigo going to be a shounen protag saving the whole world, if he’s only going to protect one thing? 

To answer this question, we need to have a look at what makes a typical shounen protag. Look at Naruto, whose ‘ninja way’ has rehabilitated countless people, who eventually became Hokage, so that ‘his ninja way’ officially became adopted as the whole Leaf Village’s ‘ninja way’. Look at Luffy and his crew, whose carefree attitudes and ride-or-die comradeship between their crew members is widely admired and emulated. Look at Fairy Tail, where Natsu’s guild is the ideal for what a guild should be, and many guilds have reformed in their image with their values. What makes a typical shounen protagonist, I would argue, are two main things: an indisputable, unshakeable, almost inhumanly good ideal widely recognized within the canon as the way that things should be, and the faith, power, and drive necessary to rehabilitate people to this ideal and change the world so that it becomes closer to this ideal. 

Naruto is the ideal of a ninja. Luffy and his crew are the ideal of a pirate crew. Natsu’s Fairy Tail guild is the ideal of a mage guild. 

Is Ichigo the ideal of what a Shinigami should be? 

Not initially! Initially, he’s just a prickly little kid with a shitload of trauma and depression to boot! Initially, his instinct to protect has a self-centred bent to it! Initially, he’s not even a Shinigami at all! 

This is where Rukia comes in. Rukia and her philosophy of protection is the ideal of this series – she is what all Shinigami should be. The text isn’t even subtle about this—Rukia canonically has the most beautiful sword (soul) in all of Soul Society. Realistic or not, Rukia is the ‘absolute good’ of this universe—her ideal is, theoretically, the universal ideal. 

But idealism alone doesn’t make Rukia the protagonist-- Rukia lacks the faith, power and drive necessary to turn people to her way of thinking and enact change, which is the other key component of a shounen protag. This is the part that Ichigo supplies—his complete and utterly unshakeable faith in Rukia and her values, the power necessary to back those values, and the ability to spread these values far and wide so that other people start to take up these values as well. I said above that Rukia’s philosophy of protection is so far-fetched that most people can’t even begin to fathom or emulate it—but Ichigo is not ‘most people’. He’s a shounen protag, goddammit! He has the ability to take up an ‘ideal’ that for most people would be impossible, and actually enact change towards that ideal. 

This is why Ichigo and Rukia are double protagonists. Not because they were designed to be matchy-matchy or because of their avalanche of matching titles or whatever else. This is why. They are literally two halves of one shounen protagonist. Kubo called them sand and rotator in the side A and B poems, and he could NOT have picked a better analogy for them. Think of a watermill (or a sand mill, as the analogy is given), which is used to grind grain. The mill by itself cannot perform its purpose any more than the water by itself can magically grind the grain. The water needs to be driven by the wheel through the right mechanisms, and the wheel needs the water to actually function. Rukia drives Ichigo, points him in the right direction with her values, and Ichigo supplies the force necessary to enact change. Rotator, and sand. One protagonist, split into two. 

(As a completely unrelated aside, I don’t know what it’s like in Japan, but in Korea ‘grinding the grain’ is a euphemism for sex, and watermills are inextricably associated with illicit liaisons. They’re the eastern world’s equivalent to the western world’s stables- any raunchy business conducted outside is usually conducted in a watermill.) 

This is also why Ichigo’s name wasn’t something more all-encompassing. He can ‘protect one thing’ and still be a hero – as long as the ‘one thing’ he protects is Rukia. He wants to protect Rukia above all else, to the detriment of others, even (as evidenced by him turning away from rescuing Orihime to rescue Rukia)—but Rukia tells him no, no, I refuse to be protected by you, you have to protect the whole world. This is why it HAS to be Rukia for Ichigo – anyone with less than the absolute selfless ideal that Rukia has could never make Ichigo into the hero. Rukia turns Ichigo’s head to the whole world, opens his eyes to the possibility of protecting more than those in his immediate circle, makes him selfless enough to go through with it. Rukia makes Ichigo the hero. (Big aside: I’m not using ‘hero’ and ‘protag’ interchangeably here. Ichigo is the ‘hero’ of the narrative, but BOTH ichigo and rukia are the ‘protagonists’ of the story.) 

But that isn’t the end of it. I have mentioned, in the past, that Bleach is not typical shounen, that it is structured more like YA lit and should be analysed as such. ‘But Sera! You just spent like 2 A4 pages talking about why Ichigo and Rukia are Standard Shounen Protags together!’ Ah but you see, that’s only initially. INITIALLY, Ichigo and Rukia need each other to become One Whole Stock Standard Shounen Protag. Rukia lacks faith and drive, Ichigo lacks ideal. They need the other to support their flaws, initially. To be completely honest, this is an excellent way to start an unhealthy codependent relationship. The most beautiful part about Ichiruki is that they don’t go down this path at all. They start becoming a whole shounen protag individually, by adopting the other person’s strength as their own. Rukia’s ideals inspire Ichigo, and by tybw, he is as avid about protecting everybody as Rukia is. Rukia sees Ichigo’s unrelenting faith in the fact that she is a good person worth saving, and starts believing in it herself and reciprocates in kind in HM and FB arcs. This is where the YA component comes in—YA protags, unlike typical Shounen Protags, don’t start off with an unapproachable ideal and the power+faith+drive necessary to change the world with it. They GROW into it. That is what Ichigo and Rukia are doing—they are both growing throughout the whole story to fit their protagonist roles, so that eventually, they can become One Whole Independent protagonist on their own. 

It’s a beautiful, perfectly balanced, ironic jigsaw puzzle: Rukia had the ideal, but didn’t have the ability to turn others to this ideal. The only person she turned to it was Ichigo, but that was enough—Ichigo turns everyone else to it as well, overcoming centuries of tradition. Ichigo had the faith and drive, but no-one to put it behind. The only person he put it behind was Rukia, and that was enough—she and her values guide his choices and actions, and he becomes heroic. Ichigo and Rukia each failed one criteria for being a shounen protag, except with each other, BUT THAT WAS ENOUGH. Affecting and changing just one person—each other—was enough to set everything in motion.

A couple other points that I couldn’t find a place to fit into the essay cohesively, but think they’re still worth a mention:

Rukia says ‘all souls should be protected’, and she enacts this by protecting Ichigo, who is a hybrid of all the different soul types present in the narrative: human, quincy, hollow, reaper. Ichigo, despite being such a mixed entity, identifies firmly as shinigami, not because the shinigami convinced him with their ironclad, lofty morals but because Rukia did. 

If Ichigo’s main flaw is being self-centred and tunnel visioned + a weird sort of superiority/hero complex, then Rukia’s main flaw is probably the exact opposite - despite having this incredible ideal, her lack of faith in herself + her tendency to obey the system in all but the most dire, life-threatening situations. Even their flaws are a perfect balancing act, mitigating each other out. (Rukia’s main flaws I probably want to go into in a bit more detail some other time, since it’s not something the fandom in general has much discussion on.)

So! In summary, the tl,dr version: 

Ichigo’s name means ‘protector’ or ‘to protect one thing’ (both versions have been used in official translations). The latter is more relevant, as I have explained above. This ‘one thing’ initially is his mom, but by the end of the SS arc, it has very firmly become Rukia, again evidence listed above. 

This had the potential to be problematic, as it’s not very heroic of someone to want to protect just one person, to hell with everyone else. BUT the narrative sidesteps that by making Ichigo and Rukia two halves of one shounen protagonist, and making them work best when they are together.

Shounen protags require two components: an ideal, and the ability+desire to enact that ideal. Rukia had the former, Ichigo had the latter. That’s why it’s not problematic for Ichigo to want to protect just one person most— because that one person is actually the ‘ideal moral standard’ of their entire universe, and she keeps telling him to use his powers for good and not just her. 

But that’s not even all. Initially, they need the other to become ‘whole’, so to speak— but they don’t stay that way. Ichigo and Rukia have an immensely positive impact on each other, and help each other grow to adopt the best traits of the other and become a hero in their own right. Again, this is why they are both protagonists— because both of them kept growing and changing, right up to the final arc.