She have what it takes to make an interesting character- restrictions.
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.
Her "Zone of Comfort" not so new - this is old mechanic of builders and Rose, the Spirit. Only diffrence, out of Zone for Hildegard - unsummon her "weapon" and blocking her fighting ability. Oh, its make her similar to Selene.
And about Ornella I meant that she wear long dress, adult face, has interesting concept and diffrent types of skills. Her reall ristriction - no AR at all.