Mitsuru does a really good job of pressuring the opponent from a safe range using her normals, her stagger pressure isn't very threatening since at max 5A range she isn't able to abuse her Strike/Throw game. The true purpose of Mitsuru's stagger pressure is to frame trap and annoy the opponent into trying to mash out or a use a reversal.
Mitsuru has a lot of tools to use in her stagger pressure such as:
Mitsuru can stagger the hits of her auto combo from max range to keep the opponent locked in place.
For 5B, Mitsuru can use either her 5B or her charged 5[B] to mix the timing up in her stagger. Her 5[B] is significantly more block even being plus on block after a dash cancel, making a follow-up 5A a very strong frame trap. She can also use the plus off her dash cancel for a throw setup, and that throw setup opens up room for her Strike/Throw mixup.
Another important aspect of Mitsuru's 5B is to catch abare attempts, just like how 5B is able to bait out reversal throw or throw tech in her pressure it can also beat the opponent mashing lows thanks to her lower body invincibility.
When applying pressure Mitsuru can gatling into her 5C whip. When going for her whip she has no true pressure strings afterwards, but she has many different options that the opponent has to react differently to beat.
Mitsuru can 5C or hold 5[C] for extra hits and cancel into a special such as Bufula to try and pressure reset or backdash cancel to reset herself back to a range that favors her. When backdashing her 5C the opponent will typically try breaking the person and that will allow your to 5A CH the opponent for a full combo or they will try to jump out which you can catch with an anti air.TOOOg
Lasty for another cornerstone of Mitsuru's pressure we have her sweep, Mitsuru's sweep has a lot of startup which make it a built in frame trap when pressuring the opponent. It will catch and counterhit any mash that isn't an invincible reversal.
Not only does Mitsuru's sweep catch people eager to mash, her sweep also catches people who don't mash due to her being able to feint it. Mitsuru can hold her feint, and that will cause the hitbox of it to not come out and significantly reduce her recovery frames allowing her to pressure reset or go for a sneaky throw.