[ Xion is silent during this long explanation, mostly because she is stunned. Such an offer -- such magic -- it's more than she could have hoped for, could have dreamed of. It's the first thing so far to sound like a real solution. ]

The -- the Fidelius charm! Please, could we try that? If you really think it would work... it'd be perfect! I -- I mean ... [ the other options sound good too. but she knows what she wants to try. still, Hermione's the expert here. ] Whatever you think would work best... all of this ideas are better than anything I've been able to come up with so far.