Oh wow, she really did summon the hero sword. So both Reve and Krau consider her worthy, but from the nightmare she had, it appears the previous demon lord expects her to follow in his footsteps somehow, so she might not remain worthy. Or maybe the demon lord thought it'd be absolutely hilarious for a "calamity" blessed by both Reve and Krau to appear, and to be rejected by both humans and demons, which would lead to endless fights.
Still, just summoning the thing, and not burning up while holding it has got to trigger tons of questions from the prince; she's got to be aware she's going to need to spill the beans about being the previous hero. Will Krau even accept another hero?