Something about weaving on Mitsuru feels wrong, like there is an answer she has to blow it up, but since we're like week one she's not sure what it is. Sort of a "too good to be true" kind of thing.
In any case, yesterday I fought 3 Mitsuru players during MI week 1 p4u casuals and here are my summations;
TL;DR verdict: 6:4 Mitsuru's adv
Mitsuru's tools
5a - good anywhere
2a - Also a good tool
2b - Good enough to hit Akihiko in the air
j.a - Excellent air to air
j.b - Excellent air to ground
The Box - shuts down a lot of Akihiko's pressure
Coup Droit - Good abare in neutral situations, can tag Akihiko on jump start up
C Bufula - Shuts down Akihiko's approach options
Akihiko's answer to them
C Weave - Gets through Mitsuru's 5a, Coup Droit, j.a, D Bufula, and others, can corkscrew on reaction.
Good Reads required to get through The Box, no two ways around it, either punish with an air hit confirm, or be wary of Super Cancel into Bufudyne.
j.c to beat 2b attempts
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Akihiko's tools
5a - faster than anything Mitsuru has, keep watch of when she's in range. Enough recovery to not get FC'd by her B attacks.
2a - same
EX Kill Rush - beats jump outs midscreen and keeps Mitsuru honest when there is distance to close.
EX Corkscrew - can do on reaction to Bufula, can follow up on FC with at least 3k
EX Boomerang Hook, useful in Kill Rush blockstrings, punishes mashing, and has guard point so it will eat through The Box and recover in time to punish her.
Mitsuru's answer to them
The Box kills a lot of what Akihiko can do, so don't get cocky.
j.d can punish C Weave so be on the look out.
Her regular pressure strings are safe, opt for a Dodge or a jump out than a poke,