some AU ship kids bc why not [kenta is @esfag's oc!]
oc x canon word count: 1.1k
Mokichi, conceived a year or so after the 4th war:
A shy, often a sickly kid and would give the polycule heart attacks whenever he caught seasonal illnesses - Tae loves fall and winter but for the first few years of Kichi's life he spent most of those seasons indoors monitoring his son's health (helped Tae get closer again to his brother though since Takashi would run over in an instant when Tae called him about little Kichi being under the weather)
Polite, anxious little bug, Mokichi is the sweetest thing to ever grace Tae's life and he loves his baby sprout more than anything in the world; he'd love him just as much regardless, but for the longest time Tae assumed it'd be impossible for him to conceive after an incident when he was sixteen that lead to complications
This leads to Tae being very clingy with him and on top of regular parental worry even into his teens, Tenzo blooms like a field of sunflowers whenever anyone compliments how well mannered and helpful his boy is
Though he has no plans to become a shinobi, his parents and relatives train with him on and off so he's very familiar with the basics and has an interest with genjutsu
Mokichi also has a little vegetable garden behind the house he's tended to ever since he could walk with Tae and Tenzo's supervision and his hair is in reference to Itama Senju (we're not questioning how it works alright the genes are geneticing)
I think Tenzo is reserved enough that he doesn't care what happens to Orochimaru so long as he's stopped—because what's done is done and Yamato's had to live his entire life like that— content to let him rot in prison forever and all that, but it's only mildly an exaggeration to say Tae wants him publicly executed for his crimes against humanity
Even post-Orochimaru's death (Kakashi would NOT let that shit fly idgaf what Kishi thinks) Tenzo is still mostly ambivalent but when Mokichi's health issues show up he finally starts resenting him posthumously because maybe it's those experiments' faults his son is having so much trouble
Tae's beside himself initially, he apologizes to Kichi while he slept whenever he got sick for not being able to give his son a stronger immune system as the one who carried him through some maybe misplaced sense of responsibility and it takes both parents years to reconcile this
Yuichi, Yukari, born three years after Mokichi:
Troublemakers one and two, they take after the Nanadaime's prankster days and most people can't tell them apart for a long time basically until they dye their hair, even some relatives (Naruto in particular, but also Tsunade, Raidou, and Kakashi - though they suspect the latter is just playing along for a bit)
Though they're showered with as much love and attention four dads can give, it's a little lame having the academy's principle as one of them, so the boys often act out to be cool or impress their peers; Yui and Yuka would never dream of it in front of Yamato because of how "scary" he can be despite how often Iruka chews them out, and for some reason can never really bring themselves to intentionally upset Tae
Yuka is often the mastermind of any prank they pull, typically on the general public or sometimes their "wimpy" older brother, while Yui is his enabler and makes sure their plans go well - they're smart, talented kids at the end of the day, the twins just have to go through the dreaded attention-seeking phase just like every other kid their age
Yuichi and Yukari are inseparable growing up but as they reach tween to teen age the boys have a falling out of epic sibling proportions - and make it everyone else's problem; Yui pulls away because he feels like he's being forced to live his life as part of a matching set, becoming more recluse, Yuka in return feels like he's losing his twin and best friend because nothing's getting through to him like it normally would and neither of them are communicating about it
Yuka comes home obnoxiously yelling that he hates having a brother after their big fight and slams the door shut to their room with Yui lagging behind at the front door—opens it a crack to clarify that he doesn't mean Mokichi though—and then shuts it again so he can cry into his pillow, the dads have to obviously intervene
After making up, their bond is different but stronger, and the boys also branch out and mingling with people without necessarily having to rely on each other - Yuichi starts hanging out with Uncle Mizuki and Aunt Koko because he's always liked his dad's team mates and their weird dynamic, Yukari makes new friends by being the social butterfly that he always ways
Yui's gender is also ??? weird but he's comfortable in masculinity, Yuka's got that tboy swag just like Tae and Tenzo with way more unearned confidence (this is also a front for his insecurities)
Inumi, born 6 years after Mokichi:
Not very verbal a lot of the time, very similar to how Tae was a kid; they're scared of the bigger Inuzuka dogs but like playing with the puppies whenever Kenta or one of their other dads brings them to the Inuzuka compound; Slate is unfortunately one of the dogs that Inumi gets scared around and they would cry as a baby whenever he barked louder than a certain threshold
Tsume and Kiba also kind of scare them with how rowdy they can get (miss ma'am destroyed her son's breakfast for waking up late jfc) but they'll cling to Hana's legs and really enjoys when Hyou comes to visit with Bull (the one exception to the big dog rule, they're chill with Kakashi's other ninken as well), they also like Hinata and Shino but have tried to impulsively eat some of his kikaichu before as a toddler
Despite their dads' (pretend) beef Inumi gets along with Mokichi the most out of their siblings, he'll sit with them quietly for hours without expecting them to respond and it's a weight off their little shoulders - Kichi also makes little origami figures for them while he does his homework or whenever he gets sick and in return Numi gets excited to help wash the vegetables from his garden when they're ready to harvest
Yui and Yuka called them lame initially but they secretly kept the cranes Mokichi made for their birthday - the cat was let out of the bag one day when Yuka couldn't find his while cleaning his (very cluttered) side of their room and cried for hours; Kichi made his silly baby brother many more cranes after this
Inumi loves the twins too of course, even if they're hard to get along with sometimes, but Kichi's their gentle kind of a pushover big brother and they'll do whatever it takes to protect him
Along with the eldest of these kids, Inumi's also perfected the infamous wide-eyed owl stare Tae's terrified many people with whether he means to or not, Numi has no problem being intentionally scary just like Yamato whenever anyone poses a threat to the people they care about; Mokichi in particular