Mansaku Sano Headcannons (sorry)
He'd mostly follow your lead.
He'd definitely help or aid you in anyway, mostly injuries, or getting you out of social trouble if you're in any.
His name Mansaku means help, aid.
He talks about how he feels younger around you.
Talks about how when he was young, he was much taller but because of his bad back (+ scoliosis) he shrunk.
Like he's living his life all normal, and then you come along and boost him in and out, suddenly he wants to do things for you. He wants you in his family because you're so kind and he can see it happen.
Would def grow flowers and give them to you.
Ya'll ever argue, and you're being petty (it's funny to look at), he's reading his newspaper absent mindedly.
Has a kind personality and a strong one, he's always determined to help you. (You can see him resemble Shinichiro/Takemichi in that way).
Would massage your shoulders, feet (if you're massaging them yourself, he'd come over).
In turn you'd massage his back, bro would be blushing in embarrassment. If not, then he would still feel it.
The Sano house not only looks traditional, but it's ran by our old man. You can see how Emma and Senju are in similar circumstances but turned out differently. So Mansaku would hold a few traditional beliefs. Ofc Emma and Senju have their own choices and are different people, but environment plays a factor.
He mentions you to his students in the dojo, like: "gotta end early today because..." or "you guys like the flowers outside? it's for...."
You would probably drop by with a pack of bottled water and he'd keep it in the dojo in some corner if anyone needs.(my dojo sometimes had water BUT YOU'RE NOT ALLOWED TO DRINK TILL AFTER CLASS. HE'D DO THE SAME).
Spaces out while training his students because of you. He'd tell everyone to run laps instead and stop when he says so. Then lose count. (i stg my instructor did that).
You'd be close with Emma. Everyone is. Emma would hope to have love when she's older. Uses your relationship to think about her future with Draken.
Manjiro would have a respectful approach to you. He'd laugh at Emma talking about romance/love or something.
Shinichiro might try to hit on you lowkey. No one is safe from him.
Izana would be happy cause he sees his family growing. He gets to experience what it's like having a grandma. He's respectful to you, his elder and might feel a bit touched.
If you're young, Shinichiro would be weirded out, would hit on you still.
Mikey would be out of the house a lot more, he doesn't wanna see.
Izana isn't even home that much because of Mikey. It's all Mikey's fault (Kazutora is that you?).
If you look young, obviously Shinichiro would hit on you (its as a joke, he don't mean it), Emma would ask for your secret. N/A for Mikey or Izana.
You'd do his eyebrows, or he fixes them up already.
NOW *cracks knuckles* time to get serious.
Mansaku Sano (Grandpa Sano) Prime.
You're with the coolest guy in his prime.
He's the type to run all the way to your house if you need help or he thinks you need it. I imagine him having some kind of 6th sense.
Surface level he seems stiff, like no emotions. You're likely to have an arranged marriage with him like back then in the good ol days with strict supervision around you two.
But if it's love, then it comes from school.
He's the type to inspire you, he's confident, and his smile shines bright (i imagine him being more like Mikey comforting or reassuring his homies. ex. season 2 when he's driving with Mitsuya at the start, and with Takemichi near the end on his bike).
He's the type to write letters.
This is generations ago, so he's the type to keep his distance physically and be respectful. Even if you make the first move.
His main love language is acts of service.
Since Mansaku is a prodigy (according to himself), he's fierce, and a bit old I imagine to have gone through traumatizing ass casual training to emotions. Which lead him to wanting to aid people and passing that lesson/attribute down.
(I mean look at how helpful Emma is wanting to protect her brother, her interactions with Hina, Mikey wanting to help Izana, there's other stuff I can't write from the top of my head, Shinichiro helping Izana, Seishu, Emma, who knows what else he did in his journey).
In an nfsw setting, he's be slow and gentle weather he likes you romantically or not. If you're both emotionally connected or on the same wavelength depending on the context then omg it'd feel so freakin special.
You'd fall first, he'd fall later. As long as you're not a shitty person.
In the end you die. Sano Russian Roulette is what you're signing up for. ♡
Just for the sake of it, I'll say that the dark impulses are something passed down from you. Back then with trad beliefs, it was frustrating growing up. You had a lot of rage. Luckily for you, Mansaku is patient, strong, and he's got that charming smile to keep you grounded.
If you do garden work, he continues to grow the flowers/fruit/veggies you grow cause it's natural for him.
If you show him your favorite meal and he remembers, he made it for himself and you. Too bad you're not here. But your beautiful daughter is.
Crying when your guys' daughter gets married, he feels like he's living his best life when his grandson is born aswell. (If you're dead it really feels like he's able to move on to find happiness, he's healing).
Scared more than ever for the first time in a long time, when his daughter is sick in the hospital. Acts of service to the max, it's a responsibility, a curse, whatever.
Honestly there has to be some kind of superpower thing in this family. We got 2 prodigies in the family(himself and mikey), Shin with powers, grandsons with some kind of raging curse.