I'm not very good at this game but i found a few things playing various matches against Yukiko.
Yukiko's tools:
5B/2B/JB fans: Really frustrating to deal with especially her 2B fans which can and will hit you out of your airdash. Akihiko's weave will actually the 5B fans to whiff. But then again, Yukiko wouldn't be throwing fans at such close range anyways. If you're feeling brave/manly or have godlike reactions, you can try to 236D through two of her fans and cork for a nice fatal. Your timing must be on point though or else you'll get hit by the second fan.
You can EX kill rush if you think she's about to throw fans for a nice combo.
I just found out that the fans can be countered so if you're close enough, you can punish with a corkscrew.
2A: This move just completely shuts down kill rush so use caution when throwing a raw kill rush out there.
Various Persona attacks(maragi,agi): For the most part, Yukiko's persona is pretty hard to hit in addition to her regular 5C>2C block strings, she can cancel them into agi to make them safe. Maragi is an incredibly annoying move that hits low and th eD version comes out pretty fast so watch out for that. You shoudl also watch out for her 2D as it hits high and be sure to hit ti as it's vulnerable on hit and block or else she'll use her 5C 2C blocksting.
Akihiko's answer to them: READS! You have to do your best to pick the best time to airdash in or kill rush in. AKihiko's ducks are pretty difficult to use here as Yukiko's double fans are pretty tricky to duck under. I found that most Yukiko's tend to throw fans after their 5AA> 5B> 5C> 2C> 236A/B block string so sneaking in a kill rush may be a good gamble to take but you always have to beware of her 2A which stuffs it.
I found that the best time to airdash in is when she's about to use maragi. You actually have a lot of time to hit her out of it and get a nice combo in. Just be sure not to try and airdash at every opportunity as her 2B and even 5A will hit you out of it.
You have to make every hit count once you're in and not let her go (although that canbe said about any matchup lol). I ended up bursting everytime if i ever got hit while she was in the corner (can be easily baited though). You want to try and finish this match as fast as possible because off of every combo she can fire boost which means she'll be able to get better combos and damage off of random hits.
