Christie and Kasumi can harass Rachel pretty badly, but yeah, Ayane can dominate Rachel at multiple ranges whereas the other 2 are better in close. In general Ayane and Christie are a pain in the ass to all the super heavyweights. I actually think Kokoro is fine against Rachel and think it's 5-5 now. Prepatch Rachel on the otherhand...
i'm gonna stop now before i ride the salt train