I personally feel that one of Hilde's biggest advantages is her flash which is simply overwhelming psychologically. For example, her c3B, 2B, and 66AB have a certain zing to them. Obviously all of these attacks do guard damage which is why they have the zing lightning effect, but beyond this I feel her variable movement as a character makes these attacks seem much more aggressive to the opponent player.
I have mained Hilde since Soul Caliber IV and coming into V to me Hilde is a daunting character because her style is very explosive. Whereas many characters constantly build up momentum to be effective, Hilde can move from stillness to aggression very quickly. Of course this has a lot to do with my playing style, but Hilde's stance and movements give off a strong sense of confidence, that when Hilde is utilized properly can be psychologically stressful for the opponent.
Beyond this a simplistic tactic that I am starting to apply to attempt to psych my opponents out slightly is A-->G or K-->G. Essentially I am inputting the horizontal or the kick and then sliding to guard really quickly cancelling the moves. This results in the case of the horizontal a really small step forward, and in the case of the kick a really small step backward. And if you are playing an opponent who is a little stressed out after you have utilized Hilde's strong start/stop playing style, it has the tendency to place you in a good position to utilize potential openings.
