For my personal experience vs Hilde, I like to use WS B BE to come to close range and make her stop to spam her kick.
I think its not really good to use it a lot, but sometime is not bad.
If she use too much backdash I do 66B, 66B, 6K, 66A or 6A+B, it depend of the range and advantage.
When she is at longue range I think we can stop her backdash but a mid/close its easy.
Close range make her backdash or use 2A/AA with Leixia's 2K and always agress her, never use spacing vs hilde.
If I understand good, she have a bad grab punish so use lot.
Very difficult to step vs her, but if she always do antistep she don't do damage if you respect the priority.
I don't see a good move to break a little random crouch gard and I think its possible to use 2A or AA when she come to throw you.
I think we musnt attack her a lot when the RO is at a little range because her two trhows can RO, B is when RO behind her and A BE I don't really understand when but I know you can RO too if the RO is behind her.
Maybe later I tell more, the hilde players are rares, I have a hilde partener but he is not actually really complete so we don't have the best vision of this MU + playing sometime with him keep to me a difficulty to understand her moves ect... really good.
I hope its possible to understand what I said.