SomeLoserLol

im like 3 months late to this post but i was very excited to find this blog and see Shōto was already here so!

Shōto's physical features being split right down the middle with one side having his mother's hair and eye colour while the other has his father's hair and eye colour is indicative of chimerism! while his siblings have unstable combinations of their parents' quirks, like Dabi being able to produce fire but not having the built in fire resistance to protect him, Shōto can produce both fire and ice but *only* from the side corresponding with that parent's hair and eye colour. this strong symmetry suggests bilateral chimeraism, but if his variation is 46XX/46XY then he's actually tetragametic, which means two different sperm fertilised two different ova and the zygotes merged shortly after fertilisation. i'm just a fan that's excited other people headcanon Shōto as intersex and not an expert, so i couldn't figure out if there's other variations of XX/XY chimerism that aren't 46XX/46XY. google's AI said there are, but i don't trust it.

anyway, tetragametic chimera Shōto. what does that entail? well, since his parents have different skin tones, a "realistic" Shōto might have patches where his skin is naturally a slightly different colour. you can see this here on singer and model Taylor Muhl, who has a large patch of different coloured skin on her torso because she has tetragametic chimerism.

[ID: a photo of a woman from the hips up. She's wearing underwear so you can see that half of her torso is a different skin tone from the rest of her body.]

he might have two different blood types, with his right being the canon type O and his left being AB like his father. this is also a fun excuse to headcanon Shōto as left handed, since most people get blood drawn from their non dominant arm. if he's only ever had blood drawn from one side, that would explain why Shōto doesn't know he has two blood types.

he might have ambiguous genitals, but he could also appear to have a male phenotype. if Shōto has a male phenotype, he might develop female secondary sex characteristics during puberty like breast tissue. given the lacking logic behind Endeavor's quirk marriage, this could be the first thing that gets picked up as unusual and lead to a diagnosis. but given Endeavor's... everything, i wouldn't put it past him to pay for Shōto's official diagnosis to be gynaecomastia instead and lie to him about it. this could lead to a fic where Shōto needs surgery at UA and, for example, Chiyo finds he has a uterus and tells him about it - a perfect set up for projecting any feelings you have about finding out you're intersex as a teen or adult, especially if your guardian knew and lied about it.

In alot of species, their intersex members are often very visually distinct, attributed to the fact that their different sexes are visually distinct

Breeding specifically for a chimera (and the practice of eugenics in general) is not at all safe so let's have another "fuck you endeavor" cause he most definitely knew what could and did happen to his children

tbh it's why im sooo fascinated by these two. it seems like they've been around for ages but instead of being actual friends to bakugou they seem to just be lackeys (or orbiters? im not sure if that term fits here lol)

it's almost like everyone around bakugou put him on a pedestal his entire life and never really treated him like a person with flaws and weaknesses and that only really changed once he entered UA where all of his peers finally stood on equal footing to him and can see him for who he is and push back against him but also meet him where he's at