I respect what you say because I know you're good. You didn't say it but I just don't like people saying "just don't get caught". "you can avoid it" "you deserve it for getting in the corner" What kind of BS is that?
I just got grabbed out of my v-reversal twice in the corner against Mika and thrown back in. What else is there after that? Let me rock, paper scissor my way out of it and if I succeed I'll head down to the liquor store and get a lottery ticket while I'm at it because I'm obviously on a roll that day.
Its a mentally exhausting matchup , you need to be perfectly on point with your AAs and spacing.
Whatever you do , DO NOT get tempted to rush her down if you land few stray hits. Be patient and pick your spot when you have conditioned her to block some strings.
Be at your usual long range and force her to jump. Neutral jump when you see her charging her St.Hk. She cant do much against Sonic booms ( make sure to mixup the version) , apart from Slide which can be punished on reaction with MK Sonic Scythe.
Her F.MP clap move is utter BS , just dont be in the range of this normal when you are zoning. Srsly I try frame trapping or whiff punishing this move , it is simply not worth it. The risk/reward is just hugely in her favor. And it recovers so quickly.
If all else fails and she finally lands a hit on you ( Which is bound to happen , because Zoning in general is much harder to learn than Rushdown ).
Try this to get out of the corner or stop her offense.
a) V-reversal if you block some of her heavy normals , most Mikas do this as part of the Grab/Meaty mixup. If you have V-trigger , dont be afraid to blow it up. Just dont be obvious about it and use it as soon as you get it. Try it when she isnt right on your face or leaving more than 2f Gaps in her block string.
b) If you block her light normals , she can grab only after 1 hit ( you have to take this mixup , tough luck there). But After two hits she has to walk forward. Check this with Cr.LK->Cr.LP->Cr.MK and now she is very far from you. You can also risk jumping to cross up , if she has pushed you far enough . Just Do a block string and back away.
c) She isnt going to Command grab you every time because she takes the risk of you Neutral jumping and taking off Half her HP. So most Mikas will go for Block Strings and Frame traps , the command grab comes in once you are conditioned to block and respect her. You need to pay attention to her negative on block normals (F.MP,S.MK,C.HP) and take your turn. Do not let her get away with Mashing shit like St.MK twice. Her heavy normals like I said before can be V-reversald.
d) Not every grab or hit she lands is going to end up with a meaty/grab situation. If they are just randomly double dashing in , try to wake up Jab and check for non meaty setups. Mixing up Quick rise,late rise and back rise , makes it harder for them to consistently setup for meaty. Heck you might make them whiff a command grab and punish.
e) Its a pretty good idea to Stand block after an LP. She cant do much off her C.MK and her C.HK is a bit risky.( Again , if you repeatedly do this , she will go for Sweeps and such )
Bonus tip : Her throw if you are standing or crouching is different. It is better to eat the throw standing because that pushes you further away. Not allowing her to meaty. If you are crouching her normal throw puts you right next to her == more pressure.
Ultimately if you are in the corner , you ARE at the disadvantage in the guessing game. But your primary focus should be to Reset the game to neutral not get damage. Dont get greedy and you will see improvement.
Frame Data Knowledge is power , you will soon see that being in the corner it isn't as bad as Rock Paper Scissors all the time. Just like how when you Zone her , you make her play by your rules. In the corner you have to respect hers.