Put some space in between you and her and whiff punish her ass. Understand that she is slow as fuck and she has to work the stun game to really damage you so don't be afraid to attempt a slow escape.
See, I keep forgetting everyone doesn't play as Christie. She has a decent speed and range advantage over Helena and as long as you stay out of stun and make her try to close that distance and punish her you're fine. Of course a skilled player will make this strat MUCH harder.
well, i play as nyo (which is my first fucking mistake) and the only damage i seem to land on helena are low jabs and low throws. most of my moves in the neutral seem to lose to her 33p (it's either 33p or 3p, not sure) which seems to just duck everything, highs, mids, and is faster than my lows