ranking some hq characters and how jealous they tend to go lol. setter heavy bc the setters r consistently the most beautiful characters in this series
oikawa: 6/10. honestly oikawa is a lot more measured about his feelings than he lets on. i don't think he's that easy to provoke into jealousy BUT he is fond of dramatics and he is a brat at heart. so his usual response is to joke around and ham up his reaction so you'll laugh and call him obnoxious. but if it's a deeper insecurity, one where he actually feels a little threatened, then he lets his feelings simmer until they explode outward and he acts in really petty, subtle, bizarre ways to the object of jealousy. he's a cool prettyboy with a reputation to maintain!! he can't be caught acting weird or feeling jealous!!! even though everyone around him already thinks he's acting super weird and knows he's jealous!!!
suga: 4/10. suga is actually pretty normal about his feelings, but that doesn't mean he's immune to jealousy lol. he's responsible and reasonable, so he tends to take his feelings in stride and like. actually talk over how he feels with you. but there are times when his jealousy explodes and he tries to act calm but he's actually punching a pillow 10000 times in his head. like haha nooooooooo it's not a big deal he really doesn't care!! then he gets super pouty and pokes you and drapes himself over you and goes don't leave meeeee and won't let go until you promise you won't. super annoying about it but he's your annoying boyfriend so you win some, lose some.
atsumu: 11/10. are you kidding me?? he's literally the most jealous man alive. king of being petty. not even osamu can reign him in. it's actually not that easy to set him off bc he's pretty respectful of your space and life, but if someone strikes the right nerve, then it's over. he brings it up to 1000% immediately. he hates when people presume on you. he hates when someone interrupts your time together. he hates when other people confess to you as if you aren't already dating HIM. he's super childish about it and has no qualms about immediately getting in the other's person face, and gets sooooo annoying about it bc he hates when people try to take what's his.
kenma: 2/10. actually not a jealous person at all tbh. it's soooo hard to get him jealous over anything bc that requires him to get worked up, which is wayyy too much effort and time for some nonsensical result. also acting like some super-possessive boyfriend is cringe... he's never going to be begrudge you for having friends, and anyone who crushes on you is irrelevant bc you already have him LOL. he's surprisingly prideful and stubborn in that aspect! however. kenma will get a little jealous if he feels like someone is encroaching on your time with him. it's annoying bc he rarely lets people close enough to be ok with having them around all the time, and he doesn't like having that challenged.
kita: 0/10. never gets jealous. look at this man; he's serene, loving, trusting, dedicated. he would never doubt your love for him and never give you a reason to doubt him. he's not the most passionate person alive, but his love is consistent and unwavering; once he says he's yours, he's yours forever. never the first to break off a relationship. you would get jealous of him more often bc hes a hot young farmer if not for the fact (1) he feels bad about making you feel insecure in any way and always immediately reassures you/lightly teases you and (2) his grandma is GUNNING for you two to get married so she wards off any other suitors like they're pesky flies found in her kitchen.