I've asked another writer this question and I really do want to know your opinion as well (if it's alright with you and also because this has lowk been eating me up inside 😭)
but what do you think is Shunsui and Katen's relationship is? because some people say that she's the representation of his lover and they look like a married couple + a family (with Kyokotsu as their child)
I mean, she's part of his soul, but hmm I really want your thoughts on this
ahhhh i love that you asked me. i had a couple different thoughts about it. and there’s s definitely a lot of room for interpretation.
overall i think since zampakuto are part of their wielders own soul, they aren’t lovers in a literal sense nor is she representing his lover specifically, but i do think their dynamic, along with kyokotsu, is familial.
because kyokotsu was never originally part of shunsui’s zampakuto and was “birthed” by ohana to hide nanao’s sword, at a glance she does appear to be the “child” of shunsui and katen. i understand some people drawing that conclusion but i think the three of them mirroring a family dynamic is symbolic of the fact that shunsui’s never had a proper family.
at least from our understanding due to the relationship of him and his brother being strained when he was young, not really having much information on his parents status and relationship and seeing as he’s lost so many people close to him
the three of them trust and confide in one another, and have a deep understanding of each other. and it’s clear they are all very close and fond of one another seeing as they use affectionate nicknames (sakuranosuke, ohana and okyō) and yes ik okyō doesn’t speak but bottom line is they get her and she gets them
together they naturally fill that void that shunsui may have, not in the traditional mother-father-child way, more like a found family if anything because they all seem to function more or less as equals rather than there being any sort of hierarchy or one sided power imbalance.
as for katen and shunsui specifically, while some see their relationship as romantic i think what they have going on is their own unique spin on the dynamic of sword and master due to a combination of their personalities.
shunsui by nature is a womanizer and very romantically inclined (perverted) but never has any serious relationships, to me katen’s looks and conduct reassembles a Oiran and their “relationship” does also remind me of that sort of dynamic.
historically Oiran women weren’t just employed for sexual services, they were very high class courtesans they had a variety of roles and learned skills and there’s suggestion that some even had political influence due to mingling with the elite classes.
even though the zampakuto rebellion arc is filler rather than canon, all of the ways katen spends her time with shunsui (drinking parties, playing games and instruments, etc) and the way she is a comfort to him and protects him when he’s injured (in TYBW) is not unlike how men would seek out and receive the “comfort” or entertainment of Oiran’s.
and as far as we know shunsui’s never had a stable relationship. he doesn’t want responsibility, he hates it, he’s had bad experiences of being relied on by others and then having them die
so to me him having a close romantic connection with anyone could be difficult for him, and it makes sense that this aspect of his personality would result in his zampakuto spirit and their relationship symbolizing that kind of service/dynamic and filling that void in a “no strings attached” sort of way. he gets affection and companionship from her but not in a sexual or romantic way.
that’s not to say that katen’s personality or role is simply to serve him (i still think overall they are closer to equals more so than a typical sword/master) especially because katen has her own will and her abilities as his sword demand that shunsui submit to her rules.
i just think that it’s poetic for the flirt with commitment issues to have a sword spirit that represents Oiran (also traditionally Oiran’s played a role in Kubaki theatre during the peak of their fame during the Edo period and Shunsui’s bankai is based off a Kubaki performance so there’s that)
this independence and demand for him to follow her rules is mentioned during his fight with stark, shunsui admits he gets tired of “playing” with katen (using shikai or bankai) because he has to follow her rules, and can’t really use the full power of his sword unless she’s in the mood for it and that she can be selfish.
in TYBW it’s clear her personality can be a little mean and some of her dialogue makes it seem like she’s jealous or possessive, even going as far as to mention that he’s wearing another woman’s kimono. again this can have a romantic implication, but i think for context it was just a jab due to her being upset he doesn’t use her in battle often.
ultimately i feel she just wants to keep him safe because she cares for him and if he doesn’t use her power because he doesn’t like following her rules all the time, he’s more likely to get injured. it just comes out in a nasty way due to her personality.
that’s my theory, but another explanation i’ve thought of though i’m less inclined to is that the relationship between shunsui and katen is a direct result of the story/stories that their bankai is based off of rather than it being a legitimate relationship.
in TYBW katen talks about fate ‘playing games’ with them (both losing an eye) that combined with the way she manifests by embracing him, the flirtatious and playful banter between them and how in the manga she mentions that she doesn’t understand how they got paired as sword and soul reaper but accepts it do all relate to the themes of the play his bankai his based off of( lovers tied by fate and pity, dying together, etc.)
their bankai manifests as a play, and everybody surrounded by the spiritual pressure of this bankai is essentially forced to act it out.
so it would make sense they too have to “act out” their roles in it and that would explain their dialogue and interactions during bankai, acting out the lovers suicide rather than being actual lovers.
sorry about the essay he’s my main man so i’m passionate about his lore 😂 but i’m no expert and i could just be talking out of my ass of course. i’d be interested in your thoughts if you’d like to share 🤭