Seimei bounces back from extreme exertion pretty quickly. Although he does kind of cheat, in that he's pretty handy with life magic.
Sleep deprivation is more of a problem, though. If he goes more than 36 hours or so without adequate sleep (around 6-7 hours a night, for him) it starts to show. He is not as focused and gets confused easily.
No one has ever met Karkat when he is not exhausted.
This is canonical--Karkat's appearances over the first four Acts all take place during the same 8 hours span for Karkat, at which point he hasn't slept for 612 hours because he refused to sleep during the entire period of the troll game session out of his need to try and control everything and coordinate 12 people. He is slightly less hysterical and belligerent once he starts sleeping again, although only marginally.
It's also canonical that trolls have powerful nightmares, and at his point in canon, Karkat's dreams are frequently just time when he's awake in another space. At one point, as his physical body passes through the space where his dreamself is, he contemplates taking a nap next to himself because he's exhausted.
Enjolras functions very well for a fair while when exhausted; he has a lot of focus and willpower to push him through. At a certain point his tendency to sit quietly watching everything will turn into relatively discreet sagging in a corner and zoning out a little until he's called upon to act, at which point he'll snap back into Pure Willpower Mode. However, when he's sleep-deprived, his metaphors get increasingly weird. (This is totally my headcanon explanation for that whole "religious wars are like two goats of darkness butting heads on the bridge of infinity" line he tosses out in canon at one point, yes.)
Cosette mostly just lets herself be fussed over and shooed off to bed, because her life hasn't contained a lot of need to push through exhaustion, and she's not the kind of person who finds reason for it. If she had to stay up, she'd be prone to getting really stressed and upset over little things while knowing full well she was being high-strung (and frustrated by it).
Thor is really, really hard to genuinely exhaust, because Asgardian. This is good, because when genuinely exhausted he's much more hairtrigger and temperamental than usual. Like Enjolras, he can push through if there's a job to be done -- although unlike Enjolras he is not otherwise quiet, and he'd make poorer decisions faster -- but when he falls over afterwards, he'll fall hard.
Kazul mostly just curls up and sleeps hard whether it's convenient for her to or not. She's exhausted! DEAL WITH IT. If she had strong reason to be awake anyway, she'd be increasingly cranky about it.
badass and maybe a little bit dozing off sitting up against the bookcase OH WAIT IS IT TIME FOR A RALLYING SPEECH, OKAY, OKAY, I'M UP I'M GOOD I'M ON IT
(Cosette specializes in being adorable, but I suspect that when tired enough she'd be still kind of adorable but also kind of exasperating to anyone not as besotted as Valjean or Marius, in the oh my goddddd we will both be so much happier after you've just GONE TO SLEEP FOR A WHILE way, if for some reason just going to sleep were not an option.)
No, I mean, obviously this is me joking about it and not a thing he's super invested in. He'll push through exhaustion because he has a laser focus on The Job To Be Done, not because he's being macho about it or has a weird Sleep Is For The Weak pride going on. Although he would definitely be tolerantly baffled to be declared adorable.
Ahsoka likely gets more snippy, perhaps even surly. I imagine jedi do have tricks for keeping exhaustion at bay though.
Sabine gets quiet and, perhaps, distracted by artistic inspirations.
Rollo gets goofy I think. I don't think I have anything to support this.
Izana will just fall asleep where ever. There's even a scene in season 02 when they fall asleep while peeling an orange. Unless they are in combat. If so, then I imagine there are drugs to help the pilots stay sharp.
Hank gets energetic and hyper focused...or so he thinks. Once he's had sleep and rest, and returns to review the work he did, more often than not, the work is flawed.
Selina gets quiet and tries to sneak off to find a place to rest. If she can't do this, she gets surly and grumpy.
Harry has extensive experience with pushing himself well past the point of exhaustion through a combination of adrenaline, willpower, and probably rage. In general, he doesn't give into the Manly Warrior stereotype of wanting to ignore all bodily needs-- he understands that wounds must be tended and such-- but if there's Things To Do, good luck getting him to take a nap. He's just sort of louder, angrier, and mood-swingy-er than usual, but it's honestly not that easily distinguishable from his usual battle mood.
Viola gets increasingly high-strung, and more prone to accidentally saying what she actually thinks, rather than a cleverly turned-around version of it.
Segundus, being something of a delicate flower, really doesn't have much ability to push himself to extremes. He'll get sort of wilty and bring on a migraine well before he is anywhere near what would be an average person's point of collapse.
Liz just gets more sarcastic. It's hard to tell the difference.
Only doing the really, really relevant ones (Henry's a normal kid really, Eriond doesn't get tired, and R2 is R2.)
Evelyn will push herself a little, and ends up kind of unfocused, bleary, and staggering to a bed to just curl up and be dead to the world. Well, she does now. Eventually she will do less of the unfocused and bleary and more of the "try not to zone out while willpowering through it."
Lois can run on fumes and strong coffee for a terrifyingly long time, considering baseline human. She will at some point start making bad decisions--er, worse than usual--and just kind of collapse. Falling asleep at her desk is probably pretty common. If she is tired enough, she won't even talk nonsense and/or football (probably also nonsense) in her sleep, which is really an astonishing thing. Probably takes about thirty at this point in her life.
Tavi tends to be able to maintain his energy and focus through probaby insane willpower until he just hits a wall--and honestly, usually someone needs to tell him to sit down and stop that, and then he passes out for a couple hours and if he meant to do two and got four he is grumpy but secretly-not-secretly grateful about it. That said, he will sometimes just sit down and then pass out if he's been super stupid. When younger, he had probably about thirty-six to forty hours before it just leaves him unable to do much but fall on his face rather literally. These days he has metalcrafting. He can probably, if he absolutely has to, go several days without sleep and not actually damage himself much/at all; if he gets short naps here and there, he can probably go upwards of a week on two hours for 48 or so. No one is pleased when he has to, but he will.
Anakin can run for longer than most because yadda yadda Force yadda yadda Jedi. He just gets increasingly waspish and bad-tempered--yes, I know, but it is basically always possible for him to get angrier. His judgment probably does get somewhat compromised, although I suspect it is usually along lines of "oh my god why did you think this strategy was a good idea." He can generally speaking salvage it with really insane creativity. If he accidentally gets sleep--whether by someone's design or passing out--then even if he's rested he may be grumpy about not being retrieved for something important. He's a fairly light sleeper when this happens, unless he's drained way beyond safety.
Except, of course, for those times that the poor sleep was due to a really bad nightmare. Those resulted in errors of judgment that led to, you know, mass murder sprees. So there's that too.
Sariel tends to fight through sleep deprivation by force of will and does fairly well up to a point, but she starts forgetting otherwise commonplace things/processes/details after it gets to a certain point. This is canon, and it still embarrasses her.
Joly just gets cranky and sleepy and tends to try and burrow at whatever or whoever holds still long enough. He's got a lot of stamina, he can be up for days with only the briefest catnaps, but once it's gone, he starts crashing irrevocably.
Bahorel becomes more open to possibilities. Exciting possibilities, like breaking into a police-house and letting out the prisoners, or stealing the lions at the zoo, or punching the sun. He's been awake 72 hours! Clearly he is like unto an immortal! Anything is possible!
Gringoire ...really just lowers his standards for what makes a comfortable bed and goes to sleep. If he gets tired enough to start making bad judgement calls even for him, then he gets arrested, and he can sleep in jail (and has, very often).
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Sleep deprivation is more of a problem, though. If he goes more than 36 hours or so without adequate sleep (around 6-7 hours a night, for him) it starts to show. He is not as focused and gets confused easily.
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This is canonical--Karkat's appearances over the first four Acts all take place during the same 8 hours span for Karkat, at which point he hasn't slept for 612 hours because he refused to sleep during the entire period of the troll game session out of his need to try and control everything and coordinate 12 people. He is slightly less hysterical and belligerent once he starts sleeping again, although only marginally.
It's also canonical that trolls have powerful nightmares, and at his point in canon, Karkat's dreams are frequently just time when he's awake in another space. At one point, as his physical body passes through the space where his dreamself is, he contemplates taking a nap next to himself because he's exhausted.
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Cosette mostly just lets herself be fussed over and shooed off to bed, because her life hasn't contained a lot of need to push through exhaustion, and she's not the kind of person who finds reason for it. If she had to stay up, she'd be prone to getting really stressed and upset over little things while knowing full well she was being high-strung (and frustrated by it).
Thor is really, really hard to genuinely exhaust, because Asgardian. This is good, because when genuinely exhausted he's much more hairtrigger and temperamental than usual. Like Enjolras, he can push through if there's a job to be done -- although unlike Enjolras he is not otherwise quiet, and he'd make poorer decisions faster -- but when he falls over afterwards, he'll fall hard.
Kazul mostly just curls up and sleeps hard whether it's convenient for her to or not. She's exhausted! DEAL WITH IT. If she had strong reason to be awake anyway, she'd be increasingly cranky about it.
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badass and maybe a little bit dozing off sitting up against the bookcase OH WAIT IS IT TIME FOR A RALLYING SPEECH, OKAY, OKAY, I'M UP I'M GOOD I'M ON IT
(Cosette specializes in being adorable, but I suspect that when tired enough she'd be still kind of adorable but also kind of exasperating to anyone not as besotted as Valjean or Marius, in the oh my goddddd we will both be so much happier after you've just GONE TO SLEEP FOR A WHILE way, if for some reason just going to sleep were not an option.)
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No, I mean, obviously this is me joking about it and not a thing he's super invested in. He'll push through exhaustion because he has a laser focus on The Job To Be Done, not because he's being macho about it or has a weird Sleep Is For The Weak pride going on. Although he would definitely be tolerantly baffled to be declared adorable.
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Sabine gets quiet and, perhaps, distracted by artistic inspirations.
Rollo gets goofy I think. I don't think I have anything to support this.
Izana will just fall asleep where ever. There's even a scene in season 02 when they fall asleep while peeling an orange. Unless they are in combat. If so, then I imagine there are drugs to help the pilots stay sharp.
Hank gets energetic and hyper focused...or so he thinks. Once he's had sleep and rest, and returns to review the work he did, more often than not, the work is flawed.
Selina gets quiet and tries to sneak off to find a place to rest. If she can't do this, she gets surly and grumpy.
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Viola gets increasingly high-strung, and more prone to accidentally saying what she actually thinks, rather than a cleverly turned-around version of it.
Segundus, being something of a delicate flower, really doesn't have much ability to push himself to extremes. He'll get sort of wilty and bring on a migraine well before he is anywhere near what would be an average person's point of collapse.
Liz just gets more sarcastic. It's hard to tell the difference.
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Evelyn will push herself a little, and ends up kind of unfocused, bleary, and staggering to a bed to just curl up and be dead to the world. Well, she does now. Eventually she will do less of the unfocused and bleary and more of the "try not to zone out while willpowering through it."
Lois can run on fumes and strong coffee for a terrifyingly long time, considering baseline human. She will at some point start making bad decisions--er, worse than usual--and just kind of collapse. Falling asleep at her desk is probably pretty common. If she is tired enough, she won't even talk nonsense and/or football (probably also nonsense) in her sleep, which is really an astonishing thing. Probably takes about thirty at this point in her life.
Tavi tends to be able to maintain his energy and focus through probaby insane willpower until he just hits a wall--and honestly, usually someone needs to tell him to sit down and stop that, and then he passes out for a couple hours and if he meant to do two and got four he is grumpy but secretly-not-secretly grateful about it. That said, he will sometimes just sit down and then pass out if he's been super stupid. When younger, he had probably about thirty-six to forty hours before it just leaves him unable to do much but fall on his face rather literally. These days he has metalcrafting. He can probably, if he absolutely has to, go several days without sleep and not actually damage himself much/at all; if he gets short naps here and there, he can probably go upwards of a week on two hours for 48 or so. No one is pleased when he has to, but he will.
Anakin can run for longer than most because yadda yadda Force yadda yadda Jedi. He just gets increasingly waspish and bad-tempered--yes, I know, but it is basically always possible for him to get angrier. His judgment probably does get somewhat compromised, although I suspect it is usually along lines of "oh my god why did you think this strategy was a good idea." He can generally speaking salvage it with really insane creativity. If he accidentally gets sleep--whether by someone's design or passing out--then even if he's rested he may be grumpy about not being retrieved for something important. He's a fairly light sleeper when this happens, unless he's drained way beyond safety.
Except, of course, for those times that the poor sleep was due to a really bad nightmare. Those resulted in errors of judgment that led to, you know, mass murder sprees. So there's that too.
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Bahorel becomes more open to possibilities. Exciting possibilities, like breaking into a police-house and letting out the prisoners, or stealing the lions at the zoo, or punching the sun. He's been awake 72 hours! Clearly he is like unto an immortal! Anything is possible!
Gringoire ...really just lowers his standards for what makes a comfortable bed and goes to sleep. If he gets tired enough to start making bad judgement calls even for him, then he gets arrested, and he can sleep in jail (and has, very often).
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Have I mentioned recently how much I love Bahorel? :D