That random Orie had to show up lol. The hidden match with Eltnum is a one time per arcade ladder thing. I think the trigger to making it happen is scoring an IK.
I'm betting Hilda is like Elizabeth in P4A and needs meter more than everyone else. By that I mean she probably has crap health and needs ridiculous tools to make up for that.
On the bright side of this, no primers means I don't have to be scared of spike chaser or 236C anymore unless one of those moves is given guard break properties.
Yeah let's just be happy our favorite robo-girls made the roster. Sure we'll have to wait a bit longer for footage of them, but hey at least they are in the game.
I'm honestly still skeptical about the mode change being her without armor. Something about a whole new set of sprites for an alternate mode of a character we've seen before leaves me in disbelief.