Free Step Dodge

Momiji has some of the easiest combos

on the ground yes, but in the air, though easy to do, the timing in them is hard.

ex her BNB 6Pkk, k or P. its that timing, if your timing is slow, the combo stops. same with her qcf P+Kppp/fc T

The timing on the aerial combos has to be swift and on par

Just keep hitting P/K/T depending on what you want to do, there's no reason not to as the game doesn't cancel it out by hitting buttons too early.

Her only difficult input is 236P+KP full circle T