Also, since we have Edison as Lion-head, it's safe to assume that this new character isn't a bunny herself but a person associated with bunny, which means her true name might be...
I saw the guess at Chang'e, but my guess is the Hare of Inaba. Although the perma-smile and possible mute-ness might be a clue too. Can't wait to see Gudako react to her lack of selection in the anime.
Master!It's nice to be peaceful.This is all a conspiracy of the devs!It's been quiet lately.They aren't, though...Sorry for the wait.The peace is all lies!Tell me your true name!NOW TELL ME YOUR TRUE NAME!TELL ME!O-Okay, leave it to me!Meanwhile.They're thinking that even if there's a new character that I came up with, I won't have time to say my claim to them any more.They sure are a sneaky bunch.I'll settle it with them in your stead!You're the only one I can count on at this time, Altera-san!Altera-san, everyone's hero!