When you're full screen, slowly inch your way forward.
Once you're midscreen, Wait for the hilda to end a string in something negative, then press your advantage. For example, the spike that comes out of the floor (22X series) is negative and can't be canceled into anything. If you do dash B in a range it will reach immediately afterwards, and hilda presses a button you'll beat her out.
Don't be afraid to just sit there and block, her midscreen mixups are all reactable. Look for the overhead animation, not the flash. The spike from that comes from behind you is +, dont hit anything. The spike from the front is negative and you can press your advantage. Make her over commit or end in something unsafe.