Oh no! The protagonist is drunk from accidentally drinking alcohol! (They thought it was juice) What are your headcanons for how they act inebriated.
These are pretty damn self indulgent and are my own personal hcs for my protags but I do hope they suffice! (Also mandatory parental warning to drink responsibly kiddos and chug water like your life depends on it)
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Protag 1 gets drunk very easily - the type that after a couple of swigs is already kind of buzzing and it’s plain to just about everybody that what he ended up drinking definitely wasn’t juice. A very giggly drunk, anything from sneezing to puns is enough to have him wheezing - seriously Protag 2 toppled back of her chair once and he cracked up bad enough that he choked on the air and fell right back down beside her. His emotions normally get the better of him and this is only cranked up by 10 so when he’s happy he is really happy, joking about with his siblings and practically lounging across the tables to hug people (Much to Toji’s chagrin as he’s typically the first target the guy goes for). But if someone tries to start something he’s the first person to try and square up especially if they’re looking for trouble with his family! This ends swiftly with the others stepping in and promptly hoisting him up and away from the line of fire, but the whole time he’ll still be throwing shade until someone else comes along to pick his mood back up, then he acts like the whole thing never even happened.
Protag 2 is the chill drunk. At first it’s easier to think that she can hold her liquor rather than suspect that she’s just really, really good at hiding the fact she’s absolutely smashed, but when you hang around her enough you can tell when something’s up. She gets very talkative with people that pass by the table, and she’s charismatic enough that pretty much every chair in the house gravitates towards the table's direction as she recalls some of her favorite stories - the thing is you never know if those stories are true, they’re just outlandish enough to make you skeptic but convincing enough a nagging part of you wonders if they really are true, for better or for worse. She winds down fast however, once the energy gets overwhelming she’s quick to switch back to chill mode and likes to spend some time on her own till she’s up to joining back in on the conversation, though she spends the whole time stuck close to Protag 5 while she recovers her social meter.
Protag 3 is the affectionate drunk. He’s already naturally warm and open to people but this is seriously cranked up when he’s got some alcohol in his system. He’s very susceptible to others emotions so if he even glimpses someone who’s not having as much fun as everybody else he’ll latch onto them for the whole night, refusing to budge until he’s able to at least get a smile out of them. He disappears halfway through the night to go to the bathroom and no one has any idea where he’s gone until he comes back half an hour later, arm in arm with several people he’s now officially adopted as new friends. Anyone with a maternal bone in their body flocks to him while he’s like this, with an inexplicable urge to protect him but he’s completely oblivious to this fact, just happy with the fact that he’s surrounded by new friends. Though he gets emotional when they all have to go their separate ways, constantly trying to hold everyone’s hand just one last time before his siblings finally convince him to head home after extensively convincing him that he’ll have plenty of time to see them after he’s sober.
Protag 4 actually gets a headache if he drinks too much so he realizes he’s drunk when he starts feeling pangs faintly throbbing against his temple. If he cuts it off there he’ll be pretty fine for the rest of the night, but if he downs the whole thing then he’ll spend the whole night with his head buried in his arms, booting anyone under the table if they’re too loud for his poor ears(looking at you Kengo). He’s rather relaxed without the headaches though - he’s in significantly higher spirits and often hangs around with Protag 2 to chime in on her stories, swearing in as a witness for some of the more bizarre stories when he sees that people start doubting her. However sometimes he’ll go right into a silent contemplation and blurts out something philosophical, often about something he shouldn’t rightfully know. At one point he even went on a tangent about the undisclosed mysteries of the ocean and some pretty damn deep thoughts about what exists outside of Tokyo - after a while he goes right back to normal, but god help if he finds someone to talk about this with because he will quite literally ramble the ear off of whoever shows a significant interest in what he’s saying. Remembers absolutely nothing about said philosophical thoughts the next morning.
Protag 5 is the hardest to tell that he’s drunk - he’s got his glass cupped in both hands and staring at the wall with a really focused gaze as if trying to figure something out that no one else is aware of. It’s actually pretty intimidating if anyone catches his eye while he’s like this, assuming that he’s glaring at them. But then Protag 3 prods him to ask if he’s okay and the guy just about melts into his chair, mournfully sniffing that he left his jacket back in the dorm so he won’t be able to help if one of them gets cold as though it’s the worst mistake he could have ever made. He’s still rather quiet but talks significantly more when compared to the normally silent persona he presents around anyone who isn’t the Summoners/his siblings and he’s a lot more comfortable expressing affection with his friends. During different times throughout the night you’ll find him with his head resting against someone’s shoulder, eyes closed and listening in on the conversation being passed back and forth across the table with the occasional content hum to let people know that he hadn’t just fallen asleep. By the time it’s time to head back he’s very insistent on making sure everyone’s back in their rooms and safe in bed before he’ll go sleep off the drink himself, and will absolutely be firm on this even as Shiro and Toji both try to convince him that they’ll be fine getting back on their own until they eventually cave.