I know I've kinda done something like this in Random Things, but this is gonna be more accurate 

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Kay: Switch, primarily dominant 
She doesn't mind letting Bakugou (possibly Kiri or Iida) be dominant from time to time, however, she mostly likes being the one on top, or the power bottom. Though, she's like her father and doesn't understand sexual jokes or anything like that 

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Koy: Switch, primarily submissive 
He wants to be the top, however, that doesn't always work for him as certain people (I see you) like to peg him and just pin him down. Though he doesn't complain, he can be bratty but he usually likes being the good boy. Now, when he gets the chance to be the top, oh he doesn't hold back, he will pin his partner down and make them beg for climax, he won't hold back 

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Ommi: Switch, complete 50/50 
She doesn't really care if she's top or bottom, though when she's a bottom, she LOVES to be a brat, and punishment is so great to her, she tries to be the untamable brat that will test the patience of who she's with. Now, as a dom, she will make you whimper and beg to stop, she will exploit every weakness you have and will make you climax more than once 

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Silenai: Sub 
She doesn't really like control unless told so, she prefers to get dominated by her partner.  She likes being tied up and slight pain, just as long as it won't cause permanent damage or anything, so choking, slight burning, and wax are all good for her. She likes to whimper and beg for what she wants, mostly just wanting to please her partner the best she can 

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Amisho: Mostly dom, slight sub 
So, after...certain things, she usually takes the dom role because she doesn't want to be weak or vulnerable to anyone, and is usually rough to show her dominance, however, after being with Shigaraki, he shows her that she doesn't have to always be so rough and that she can just be gentle and calm...he shows her how to make love instead of fuck essentially, which she was a little scared but with Shigaraki, she let him take control, and he was very soft and gentle with her, so she doesn't mind the sub as long as it's making love. So, she's either a rough dom or a sweet sub

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Akari: Sub 
She's very shy as we know, and she is in bed as well. It was awkward at first when she was with Hizashi, but after she got comfortable, she quite enjoyed her time, she likes to take things slow and at a nice pace, she doesn't want anything rushed or too rough, luckily for Hizashi though, she loves to please her partner, and does everything she can for him, but he makes sure to please her just as much as to not make her feel like a toy 

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Sabine: Dom bottom (I'll make sure to do her next in the OC info book) 
Because she loves attention, she likes to be the bottom, however, she loves being bratty. She wants to be spanked, tied down, and chained up, and since Natuso (in my opinion) seems like a sub, Sabine has to guide him a bit, which is why she's a power bottom 

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Hizani: Switch 
Now, she's still new to things, but when she's more experienced, she doesn't care which one she is, because she only wants to make the one she loves feel good, whatever it is he wants. Though she has her moments when she wants him in any way she wants, she does make him feel good, but she likes to tease him and just be in control of him. She does love it however when he takes control because, well, she's with Tamaki, and he would probably take control rarely, but when he does, she's wrapped around his finger, and- 
Well...use your imagination 

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Kerindia: Switch, primarily sub 
She doesn't really care but does like being the bottom for her partners. She likes to just take things at a nice pace and make sure everyone feels pleasure. She doesn't mind taking control though, and when she does, she makes sure to get the job done, and depending on her mood, she's either a soft dom...or will fuck your brains out 

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Kerindio: Dom 
You know I have to put the most sexy and sex-driven guy in. He loves to dominate, but he dominates in multiple ways. Depending on who he's with, he can be soft dom, hard dom, bdsm dom, you name it, he's probably been that kind of dom. He only degrades if asked, but won't do it just because, as consent is very important (which goes for everyone on this list) and only does the kinks his partner likes. He has almost no limits and will do pretty much anything you ask 

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I'll just do this much, and no I'm not doing Author-Chan, aka meh, because I'm not going to expose myself like that and get judged for anything. Am I saying you'll judge me? No, but I am embarrassed to, and besides...I have kinks but I'm...still a virgin at the moment...

I'M STILL YOUNG SO DON'T LAUGH AT MEH 

Anyway, have a good day