So she did end up picking up the sword; I thought she wouldn't. I was completely blindsided because I expected that the sword would sit there untouched. But the vampire picked it up despite getting burned, threw it away at Rama, then broke her sword and finally aimed at her friend, so basically just setting her up to pick her Reve.
Ogres are strong though so I don't know why she didn't think to just go punch him when the magic failed to stop him and instead considered taking the time to pick up a sword that would burn her (which might make her flinch or cause poor aim) and also looked too big for her to stop him. So yeah, even with all that setup it still seems contrived and I don't think she should have picked up the sword.
Now that she has Reve she's got quite the claim on the title of demon lord.
It's interesting the sword adapted to her, I did think it might since it really didn't fit her style.