common haikyuu misconceptions
i might make a more comprehensive list later, but i just gotta get this out now to scratch the itch:
date tech is a vocational school for engineering (as evidenced by hq-bu and its name), NOT a regular highschool - meaning there's a focus on getting actual hands-on experience and the classes are likely specialized to the fields the kids want to get into as soon as they graduate highschool. i doubt any of the date tech kids went to college because of this, as vocational schools fast tracks their students into their respective careers. (it's also why the third years not having jobs is a running gag in bu, bc they very much could start working right after highschool, esp if they don't go to uni)
so far the only member of shiratorizawa's team to have been explicitly confirmed to have passed the entrance exam and was NOT scouted by washijo is shirabu. it's been stated that anyone scouted earns a sports scholarship that lets them bypass the entrance exams.
this gets glazed over because of how emphasized the accents of inarizaki is, but our main cast+anyone else from miyagi almost certainly also have accents, that when localized would also be rural-country adjacent! washijo is localized with a accent written out similar to inarizaki's, but he's actually speaking with a more thick miyagi-ben that's difficult to distinguish in english.
what class number a person has (typically 1-5, but can go higher depending on the school population) can correlate to their general state of their grades (on the lower end would usually get assigned to class 1-2, while those who are aiming to get into competitive unis are 4 or higher) however this isn't always the case but does work for a general rule of thumb. i do have to say being in lower ranked classes doesn't necessarily equal to stupid, just not academically inclined.
if school has academy in the name it's a private institution, whereas -highschool (karasuno, inarizaki) implies it being a public school.
character writing errors:
NO ONE FROM SHIRATORIZAWA WOULD EVER CALL USHIJIMA USHIWAKA. sorry, this one really pisses me off bc the dub reallllllly fucked up with localizing nicknames/how characters refer to each other and is super inconsistent BUT I DIGRESS. it's extremely rude and implies he isn't worth a proper address of either his first or last name, and considering ushijima is implied to be an old wealth type of family with a lot of history to the point where they broke tradition to have waka's father take on the ushijima name upon being married - it's very very insulting. the third years would call him wakatoshi, while 2nd and 1st years call him ushijima/ushijima-senpai. ESPECIALLY SHIRABU HE WOULD DIE BEFORE HE EVER CALLS HIM USHIWAKA (biting my phone in rage at how this shit made it into the dub script)
who uses first names/who doesn't can get confusing, but a character who consistently uses first names, even when absolutely not appropriate is tendo. he even calls washijo tanji-kun which is fucking insane because he's not only an elderly staff member, he's washijo. the fact that he gets away with this implies either tendo's always this rude or they're very close (my personal preference) interestingly he does call semi by his last name, just with the twist of it being an affectionate nickname (semi-semi) which implies closeness considering the only other guy who isn't just [first name] or tanji-kun is wakatoshi (waka-kun)
everyone knows oikawa loves using nicknames, but in regards to how he formulates said nicknames for his team, it seems to be based on making their last names sound as cute as possible. adding an -un (matssun) or -chi (watacchi) or just using -chan, an affectionate term often used for girls or young kids (iwa-chan). the two (technically four) who break this trend is makki (interesting that he doesn't call him hana-chan, which would fit his naming scheme more as that's a very common cutesy nickname) and kyotani (kyoken, which might be a ref to ushijima being ushiwaka as a form of subtle disrespect and may imply that oikawa probably likes him the least out of everyone on seijoh but sees a little bit of ushijima in him) yahaba and kindaichi unfortunately do not have canon nicknames however which is. strange. i personally deign them yahabun (because yahaba is also set to be oikawa's successor and the oyabun/boss of seijoh) daikun (in reference to him low key being built like a radish) daicchan would also be acceptable. the use of last names is verrry interesting tho considering the cutesy-ness of his naming choices would lend itself better to the use of first names, implying there's an invisible wall he's putting up between him and his teammates (writers, make of that as you will)
hinata is sometimes written to be ruder than he actually is, because canonically he's pretty respectful to anyone older/figures of authority, with a notable exception: oikawa. however, you could argue his intent isn't to be rude, rather he views his nickname as cool (similar to his original view on kags' king of the court nickname) though he calls him oikawa-san post timeskip. he's a good noodle 🥺
inarizaki does not have a confirmed vice-captain, however considering all the little context clues given it's verrry likely to be oomimi ren, as he's close enough to kita for atsumu to joke they're married (👀👀👀) and aran, for all his screentime is never explicitly stated to be vice captain when there were plenty of opportunities, esp in the scene where kita was named captain. very much a soekawa jin situation where a character w very little screentime actually had a relatively important role within the team
i put this one last bc it's a nitpick with no definitive answer, but it is highly likely that reon ohira, aran ojiro, adriah tomas, and oriver barnes are incorrect spellings of the intended names of these characters. the correct spelling based on intended naming themes should be leon (lion theming fitting with shiratorizawa's apex predator theme), alan (fox in breton language), adrian (highly likely to be american), and oliver (this one should be a no brainer)