So heres one MU we've seen a ton of, and it's no where near as free as I had first imagined. So far it looks like the best thing we can do is play the zoning game more in this MU, and if she Dias to go in and put a stop to it.I feel though we shouldn't rush in and be super aggressive until we kill her Persona for a bit. Yukiko seems to thrive at the mid range where her Persona is a bit too fast to consistently punish, so we want to be a bit out of that range to be able to kill it easy and outzone. 2B makes an amazing Persona killer in this MU.
Not sure if this is useful, but you can duck under her fans with Aegis's Mortars.
2B is great against everyone who tries to zone you out and use persona moves too liberally.
I define this match-up as how many chariot supers I can do in response to her reversals, it will punish her R-action as far as between half to 2/3's the screen, and I'll trade her getting hit by my super and me getting hit by her reversal super flames most of the time, sometimes I even come out positive in the trade.
But when it comes down to it you treat this Match-up similarly to almost any other character against Yukiko: Don't get caught in her pace and her zone.