Hildegard concept is actually nice!
I haven`t felt that interested in C.Romina or Canna\Ornella\Charlotte, but that one is ...i`m hyped!
Only limit Ornella had was overall damage of her stance. Canna ...no comments. Charlotte only became restricted with Diablo nerf, as right now you can`t use her personal artifact without taking care of mana sustain.
And Hildegard is great in that term. Literally a "zone of commfort" with unlimited time, but requiring you to fight right here and right now.
Other then that...it`s a typical melee skillset from GE, with a bit of mobility and mid-range targets control.
But at least that`s an interesting concept, which none of modern characters really have.