first off lets start with their main dynamic. normally when all of them punish together, they take on three different roles- one per each. the punishment, the reward, and the aftercare. 

it gives a sense of organization and none of them really mind- they enjoy the roles they took on. 

normally, Saint-Germain handles the punishment, Sirius the rewarding, and Hideyoshi the aftercare (to no-ones surprise)

occasionally, Sirius and Saint-Germain might switch roles, because it isn't too difficult to tip Sirius over the edge and Saint-Germain does have a thing for watching.

if, somehow, you manage to piss all of them off enough to be punished by all three... god save your soul but that's a story for later

now on to the main ways to tee them off, then on to the fun part :)

Saint-Germain (ironically) doesn’t really like to share. the main way to earn a punishment from him is to play on his jealous bone

lean a little too close to Arthur, brush your hand against napoleon’s across the dinner table, fix sebastian’s hair when it falls into his eyes as he’s washing dishes... bend over a little too slowly in the dining room when Isaac drops his fork. definitely don’t wear anything revealing (though he’s bought you quite a few more revealing things to wear just for him, Sirius, and Hideyoshi) outside of your room. 

Sirius hates when you question his dominance, when you tease him as if you don’t believe he’ll do anything about it.  he despises when you disobey his orders, and hates when you treat either of the others as if they have more power than he does (comte in particular- he likes to be on an equal level with his other dominants but you tend to treat comte with a little bit more respect than Sirius because comte is the one who usually comes with a punishment)

Hideyoshi has admirable control over his feelings, things like jealousy don’t tip him over the edge, but the two things that will cause him to lose it, drop his self control and punish you with pleasure and light pain until you listen to him, are when you do anything to endanger yourself and when you pleasure yourself without permission

starting the fun part. their individual punishments. 

they always tell one another when they have to punish you so you don’t end up with too many punishments and no rewards (theyre a very organized group of... daddies...) 

they usually like to punish all together, so that all three of their roles are perfectly fulfilled, but of course sometimes it comes down to them punishing you on their own. 

they do have one big rule though- they never punish you in your room. that’s your safe area and they want to keep it feeling like a safe area for you. anywhere else is cool though. and I do mean anywhere. 

Saint-Germain likes to punish you in his own room. his solo punishments mainly include staking his claim. marking you as his own is a big thing when he’s jealous, so expect a lot of hickeys and biting. 

he has amazing self-control, and even when he’s absolutely losing it inside, youll never know by looking at him. 

he always has a calm, elegant smile on his face, at least until you look away, and his eyes narrow and darken and his tongue darts out to wet his lips. 

he’s all gentle teases, he loves hearing you beg for him- knowing you belong to him. his hands brush over your skin in-between bites, just barely touching you until you’re begging and pleading for him to touch you properly. 

he marks you calmly, lips moving slowly over different areas of your body to stake claim with his lips and fangs so that you remember not only who you belong to, but who’s punishing you. 

he tends to tie or cuff your hands- he wants you to know who’s in charge, and who’s not. hint: you’re most definitely not. ever.

he’ll stuff your own panties into your mouth and flip you over onto your front, mumbling that no-one should hear you but himself before continuing to tease you. his teasing would get worse with every punishment, making sure it would be one you wouldn’t soon forget.

just before you snapped, he’d stuff you full of his cock, pausing to let you adjust and groaning lowly in response to the loud cry of relief it drew from you. 

he’d thrive off your noises, fucking you fast and rough and when you spit your panties out, he’d stuff your mouth instead with his fingers. 

by the time he was done with you you’d be utterly exhausted, and so he’d clean you up and take you back to your room, calling Sirius and Hideyoshi in so you were surrounded and taken care of by everyone you loved when you fell asleep.  

Sirius would generally use a bit of a rougher punishment, intent on proving to you that he could be just as good, if not better, of a punisher than the others when it came down to it. 

he’d punish you anywhere he could get you alone (except your room of course), taking you into any room with a lock on the door and immediately pinning you to the wall with his body, one hand pulling your thigh up to lock around his waist and his other roughly grasping your chin to force your eyes to meet his. 

he’d lean down and lock your lips, kissing you rough and deep before lifting your other leg to hold you up entirely with his own body and the wall behind you so that you were utterly vulnerable to him, smirking when you whimpered as he ground himself into your core, opened to him due to your legs being wrapped around his waist. 

“what’s that little lady?” he’d tease against your lips, grabbing your waist with his hands to hold you as he stepped back off the wall, moving to find somewhere he could sit down. 

as soon as he sat down he’d grind you down on his growing erection before practically shoving you off, placing you on the ground with a dark gaze before folding his arms and leaning back. “strip” he’d demand, watching you do it before patting his fully clothed thigh, silently instructing you to bend over his knee. 

he’d make you count and thank him for each spank until your ass was red and raw, and then he’d pick you up and lift you to straddle his lap, grabbing your hair and once again making you stare into his eyes, smugly smirking at the tears staining your cheeks. 

“will you listen to me now, little lady? or do you want me to throw you around? you want me to tease you like comte? you want me to fuck you like him?” his deep voice would ring, one hand at your waist, holding your ass down on his pants so you could feel the burn of the rough fabric against your hot skin as his other hand grasped the hair at the nape of your neck to keep you completely controlled under his touch. 

he loved your whimpers, always wanting you to be louder for him. 

he’d make you ride him, watching amusedly as you searched for pleasure that only he could give you until your thighs burned and you begged him to fuck you. 

he’d move you to the wall again, using it as leverage to plow into him until you were crying for him. 

afterwards he’d wrap you in his jacket and, just like comte, he’d take you back to your room and call the others to come help you calm down and rest. 

Hideyoshi prefers to punish you with pleasure, overwhelming you until you’re shaking in sensitivity. if you carry something you know is too heavy for you or aren't careful enough with a kitchen knife and risk hurting yourself and happen to get caught, he’ll instantly scold you, taking whatever object from your hands and telling you to go back to his room  while he handled this

instantly you’ll know what he has in store for you, so you’ll obey in order to keep yourself out of trouble (if you’re to really tick him off by disobeying he’ll hunt out the others for a rougher punishment that he couldn’t provide himself- he really hated hurting you in any way and therefore his punishments were always a bit weak)

if he finds you in his room obeying, he’ll immediately tear your clothes off and pin you down to the bed, tying you up with your own clothing so you can’t push him off as he leans down and presses kiss after kiss over every bit of your skin. 

he won’t hesitate to let his hands wander, pleasuring you instantly. he could never resist the urge to touch you, and so he never did.

the second his fingers stuffed themselves inside of you he’d be going at an overwhelming pace, pounding into you until you came as his lips worked over your skin

as soon as you come, his lips will be trailing down, cleaning his fingers off before he starts to suck on your clit, making you whine in overstimulation and squirm to get away. 

he would live off your reactions, loving the way you whined when he overwhelmed you with pleasure. his goal would be to make you cum on his tongue and fingers as many times as you could stand, tiring you out before he finally made love to you

his thrusts would be soft and slow, loving the way your walls clenched and spasmed around his dick as your body shook and you whimpered for him

“shh,” he’d soothe you, thumbs stroking the tears from your cheeks as he peppered kisses over your face. “let me worship you,” he’d hum, moving to mark over your neck. “since you never worship yourself.” 

you would be utterly exhausted when he was done with you, panting and lying limp with drooping eyelids as he untied you and dressed you in the sheet of his bed, covering you entirely so he could take you to the thermae and let the hot water soothe your muscles. (he’d of course leave a note on the door to keep everyone else out) and then carry you to your room to lay with you as you slept. 

NOW if you managed to piss ALL of them off simultaneously, like if you were playing with them, teasing all three in whatever way you could throughout the day to get their attention, their eyes would lock in recognition and they’d already know what needed to be done. 

clearly you just wanted attention and so they wouldn’t give it to you, making you push them further and further until there was no avoiding a punishment. the three of them would stick closer together throughout the day, making sure that if one of them caught you alone they would all be there and as soon as you were alone, they’d shove you into whoever’s bedroom was the closest and all three of them would work together to keep you under control. 

Sirius would have your hands behind your back, hideyoshi clearing off a space on the bed to for Saint-Germain to push you down on. Sirius would smirk mischievously, pulling your wrists over your head to hold you still as he kneeled on the bed, your head laying on his crotch as you felt his cock grow beneath your head. Hideyoshi grabbed your ankles, holding you still and kissing over your legs as Saint-Germain moved to straddle you, smiling calmly as his fingers would stroke your cheek. 

“is this what you wanted, ma chérie?” he would coo, leaning down to kiss your lips as his hands wandered over your torso, finding purchase against your chest. 

Sirius would watch silently as comte teased you, smiling at your whimpers and occasionally chiming in to offer comte a better idea, or a way he’d like to see you punished. 

Hideyoshi would gently worship your legs and ankles with kisses and nips of teeth, massaging your feet with his hands to keep you grounded, smirking as he watched the other two punish you. “be gentle with her,” he’d croon almost teasingly, pausing to kiss up to your knee and back down before repeating it with the other leg. “she can’t handle both of you,” 

he’d spur on more teasing, making you whimper in protest because you wanted both of their punishments, all three at the same time. 

eventually you’d end up with comte fucking your mouth, sirius plowing into you from behind as hideyoshi watched, controlling the movements of your hand around his cock with thrusts of his hips until a larger hand wrapped around yours and sirius smirked, telling you to “do it right, or else” as he helped you pump hideyoshi’s cock until it was his turn to take care of you, using gentle pleasure and praise to bring you back down from your overwhelming high.