omg I can see masaki and masako being the closest out of the siblings... like if they're not fraternal twins I hc them to be the closest in age. They bicker with each other a lot but if it's them vs masato they r always teaming up against him
Masato comes home to find them playing card games w an intense silent aura around them. masaki Will lose his favorite keychain in a round of texas hold em bc his poker face sucks. masaki roping masaomi-nii into putting an apple on his head so he can watch masako shoot it from across the yard (masaomi indulges them bc he thinks they're cute). And other things that make masato's blood pressure spike when he visits from the dorms "I need to get out of this house Now" <- internal monologue of a guy that loves his siblings so so much.
For some reason I saw him as the sporty type but shogi club is really fun for him... he's sooo like those preteen boys who r randomly obsessed w chess.com
YEAH YOU GET MEEEE I never did try my hand at the math of how much older than masato masaomi is, but we can put that aside. I know at least as far as school year it goes masaomi >>[?]>> masato > masaki > masako, as in for the youngest three it's a school year buffer each. e.g. masato in his second year of middle school, masaki in his first year of middle school, and masako in her sixth and final year of elementary school.
we can actually see the 中 1 and 小 6 for 中学校 (middle school) and 小学校 (elementary school) respectively here I'm just on my laptop right now and can't be bothered to slap a couple red circles around them. anyway I point this out because it's totally possible for these two to be irish twins. like I feel in my heart that masaki could be a january baby and masako a november baby, and that they were both born in the same year. it just feels really right to me. along this same line with the way masato isn't that much older than them it gets a little fuzzy with how older-brotherly he can really pull off being. like I feel like he has an easier time looking after masaomi than he has looking after them, since masaomi is kinda on his own in a lot of ways whereas the youngest two have each other. so when those stupid arguments crop up it's always gonna turn out to be masato vs saki-sako. and he doesn't have a winning record there. Sucks to suck.
the apple target thing is so delightfully evocative to me. I think by far masako has the least expressive face, so I see her taking aim at the apple like ò_ó 🏹 🍎 (her brother is invisible for how locked in she is) whilst masaomi is having fun masaki is having fun and masato is having heart palpitations. I think it'd be really nice if they kept with their respective clubs into high school, because the idea of the hanzawa siblings terrorizing the cultural club scene as a set is just so much fun on principle. while maa-nii is away at the dorms of his halfway-far off school, first- and second-year hanzawas masaki and masako are having some overly imaginative reputation as a strategist (board game player) and his general (partaker of archery) established about them largely without their input. which is good for them I think.
anyway I think masaki's the kind of person to like being outside only so long as he's not moving, which means eating his lunch in the courtyard and then going inside to play in the club room, and masako's the kind of person to like being outside only so long as she's not moving, which translates to She takes the shot from a stationary position, hits the dead-center of the target, and then retires to sit and watch everybody else have a go at it. that's what I think.
tangentially with maa-kun being masato's nickname at home, the nickname rule as I see it is as follows:
masaomi -> niichan, omi-nii
masato -> maa-kun, maa-nii
masaki -> saki-kun, saki-nii
masako -> masa-chan, sako
thank you for playing in this space with me
